Mausoleum find rekindles ancient Chinas blood sweating horse legend


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The bones of 80 horses unearthed from the mausoleum of a Chinese emperor who lived more than 2,000 years ago have rekindled an ancient legend about blood sweating "heavenly" horses from central Asia.

An archeologist clears off a pit to make archaic horse bones emerge in Han Wudi Maoling Mausoleum, Xingping County of northwest China's Shaanxi Province. Shaanxi Provincial Archeology Research Institute started disentombing two burial pits of Maoling Mausoleum, tomb of Emperor Wudi of the Western Han Dynasty(206B.C. A.D. 25), in Sept. of 2009. (Xinhua Feng Guo)

The skeletons were found in two sacrificial pits within the mausoleum of Emperor Wudi of the Western Han Dynasty (202 BC-8 AD) in Xingping city, northwest China's Shaanxi Province, said Yang Wuzhan, a researcher with the provincial archeological institute. Yang and his team began excavating the two pits in September 2009, but had published few of their findings until Monday.

Each of the two pits was a huge cavern containing 20 caves -- each "guarded" by two stallions and a terracotta warrior, Yang said.

He said archeologists have conducted lab work on the skeletons and confirmed all were adult male horses. "Scientists will soon carry out DNA tests hoping to determine the genus of the horses."

The finding was likely to rekindle a centuries-old Chinese legend about the mysterious blood-sweating horse from central Asia, Yang said.

"The legend goes that Emperor Wudi offered a hefty reward for anyone who could find him a mysterious 'blood-sweating' purebred horse that was said to have roamed central Asia, but was rarely seen in China," he said.

Today, the horse is identified as the Akhal-Teke, one of the world's oldest and most unique breeds.

Wudi left China's earliest written record of the breed, in a poem he composed for his Akhal-Teke mount, describing it as a "heavenly horse".

The horse is known for its speed, endurance and perspiration of a blood-like fluid as it gallops along. It was also believed to be the mount of Genghis Khan (1167-1227).

Wudi was best known for his opening of the Silk Road, an ancient trade route linking Asia and Europe.

Construction of his mausoleum began in 139 B.C., a year after he was enthroned at 16 years old, and took 53 years.

The mausoleum had more than 400 sacrificial pits, more than the mausoleum of the "first emperor" of a united China, Qin Shihuang.



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Chinese Celadon

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Earliest humans not so different from us, research suggests


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That human evolution follows a progressive trajectory is one of the most deeply entrenched assumptions about our species.

This assumption is often expressed in popular media by showing cavemen speaking in grunts and monosyllables (the GEICO Cavemen being a notable exception). But is this assumption correct? Were the earliest humans significantly different from us?

In a paper published in the latest issue of Current Anthropology, archaeologist John Shea (Stony Brook University) shows they were not.

The problem, Shea argues, is that archaeologists have been focusing on the wrong measurement of early human behavior. Archaeologists have been searching for evidence of "behavioral modernity", a quality supposedly unique to Homo sapiens, when they ought to have been investigating "behavioral variability," a quantitative dimension to the behavior of all living things.

Human origins research began in Europe, and the European Upper Paleolithic archaeological record has long been the standard against which the behavior of earlier and non-European humans is compared. During the Upper Paleolithic (45,000-12,000 years ago), Homo sapiens fossils first appear in Europe together with complex stone tool technology, carved bone tools, complex projectile weapons, advanced techniques for using fire, cave art, beads and other personal adornments. Similar behaviors are either universal or very nearly so among recent humans, and thus, archaeologists cite evidence for these behaviors as proof of human behavioral modernity.

Yet, the oldest Homo sapiens fossils occur between 100,000-200,000 years ago in Africa and southern Asia and in contexts lacking clear and consistent evidence for such behavioral modernity. For decades anthropologists contrasted these earlier "archaic" African and Asian humans with their "behaviorally-modern" Upper Paleolithic counterparts, explaining the differences between them in terms of a single "Human Revolution" that fundamentally changed human biology and behavior. Archaeologists disagree about the causes, timing, pace, and characteristics of this revolution, but there is a consensus that the behavior of the earliest Homo sapiens was significantly that that of more-recent "modern" humans.

Shea tested the hypothesis that there were differences in behavioral variability between earlier and later Homo sapiens using stone tool evidence dating to between 250,000- 6000 years ago in eastern Africa. This region features the longest continuous archaeological record of Homo sapiens behavior. A systematic comparison of variability in stone tool making strategies over the last quarter-million years shows no single behavioral revolution in our species' evolutionary history. Instead, the evidence shows wide variability in Homo sapiens toolmaking strategies from the earliest times onwards. Particular changes in stone tool technology can be explained in terms of the varying costs and benefits of different toolmaking strategies, such as greater needs for cutting edge or more efficiently-transportable and functionally-versatile tools. One does not need to invoke a "human revolution" to account for these changes, they are explicable in terms of well-understood principles of behavioral ecology.

This study has important implications for archaeological research on human origins. Shea argues that comparing the behavior of our most ancient ancestors to Upper Paleolithic Europeans holistically and ranking them in terms of their "behavioral modernity" is a waste of time. There are no such things as modern humans, Shea argues, just Homo sapiens populations with a wide range of behavioral variability. Whether this range is significantly different from that of earlier and other hominin species remains to be discovered. However, the best way to advance our understanding of human behavior is by researching the sources of behavioral variability in particular adaptive strategies.



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Archaeology team tells Queen, We want to dig up Henry VIII

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The Olmec Exhibition at the de Young Museum

Considered the “mother culture” of Mesoamerica and recognized as America’s oldest civilization, the people known today as the Olmec developed an iconic and sophisticated artistic style as early as the second millennium BC.

OlmecThe Olmec are best known for the creation of colossal heads carved from giant boulders that have fascinated the public and archaeologists alike since they were discovered in the mid-19th century. The monumental heads remain among ancient America’s most awe-inspiring and beautiful masterpieces today.

Olmec: Colossal Masterworks of Ancient Mexico, featuring over 100 objects drawn primarily from Mexican national collections with additional loans from over twenty-five museums, is presented at the de Young Museum February 19 to May 8, 2011. Included in the exhibition are colossal heads, a large-scale throne, and monumental stelae in addition to precious small-scale vessels, figures, adornments and masks.

Olmec brings together for the first time new finds and monuments that have never been seen by American audiences and reveals new scholarship on Olmec culture and artifacts. Curator Kathleen Berrin explains, “In the fifteen years since the last Olmec exhibition on American soil, archaeologists have made amazing finds at key sites in Mexico. Informed by the most recent scholarship, this sweeping international project brings together a terrific collection of artworks that paint a vivid portrait of life in the Olmec heartland.”

The pre-Columbian Olmec civilization flourished in the Mexican states of Veracruz and Tabasco between 1400 and 400 BC, corresponding with the Golden Age of Greece and the Zhou Dynasty of China. Olmec architects and artists produced the earliest monumental stone structures and sculptures in North America, including enormous basalt portrait heads of their rulers weighing up to twenty-four tons. Examples of large-scale works in the exhibition include:

Monument Q (colossal head) from Tres Zapotes––carved from a distinctive porphyritic basalt and weighing over eight tons, this was the second colossal head to be discovered at Tres Zapotes. Colossal Head 5 from San Lorenzo––discovered in 1946, it was created using a combination of polishing and fine and rough hammering. Stela 1 (female figure) from La Venta––standing over eight feet tall, the stela presents a surprisingly naturalistic female figure in a pleated skirt standing in a niche. Monuments 7–9 (twin figures and jaguar) from Loma del Zapote-El Azuzul––a sculptural representation of two young Olmec rulers, twins, paying homage to a feline-jaguar deity. Small-scale jadeite objects, which embody the symbolism of sacred and secular authority among the Olmec, attest to the long-distance exchange of rare resources that existed as early as 1000 BC, and Olmec artists were unsurpassed in their ability to work this extremely hard stone with elementary tools of chert, water and sand. Jadeite highlights on view include: Kunz Axe (votive axe) depicting a supernatural being whose physical features are drawn from multiple sources in the natural world. A massive selection of polished axes from El Manati made from serpentine, greenstone, and gray, green, black and veined stones. Offering 4 (group of sixteen standing figures and celts) from La Venta, an extraordinary discovery from 1955, is a multiple group of religious figures engaged in a major ceremonial scene. Majestic winged plaque with Maya hieroglyphic text on the verso dating to 100 BC.

Source: Art Daily [February 21, 2011]


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Iceman Oetzi gets a new face for 20th anniversary

Iceman Oetzi, whose mummified body was famously found frozen in the Italian Alps in 1991, will get a new face for the 20th anniversary of his discovery.

OetziAs part of a new exhibit at the South Tyrol Museum of Archaeology in Bolzano (www.iceman.it), two Dutch experts -- Alfons and Adrie Kennis -- have made a new model of the living Oetzi, this time with brown eyes.

Indeed, recent research has shown the Iceman, now approaching the tender age of 5,300 years, did not have blue eyes as previously believed.

The Kennis model was created based on three-dimensional images of the mummy's skeleton as well as the latest forensic technology, and will go on display on March 1 until January 15, 2012.

The Bolzano museum is also planning to improve conservation of the mummy by using pure nitrogen, which should help it keep its relatively young appearance by eliminating oxidation.

Oetzi was discovered on September 19, 1991 by a German couple in a glacier in the Oetztal Alps in South Tyrol, northern Italy.

The Iceman, who is believed to have died around the age of 45, was about 1.60 metres (5 foot, 3 inches) tall and weighed 50 kilogrammes (110 pounds), about average for his time. If he had lived today, he would have worn size 38 shoes.

But Oetzi's notoriety has also been linked to a supposed curse surrounding the mummy, after several people -- authors, researchers, even mountain guides -- who came in contact with it died over the years.

One of the couple who discovered Oetzi was found dead after a mountain hike in 2004. A forensic expert, who had closely examined the find, meanwhile died in a car accident in 1992 on his way to a lecture about Oetzi.

Source: AFP [February 18, 2011]


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Greek islands guide: A literary Odyssey of island life

Every publisher's nightmare? Or every reader's dream? When the publisher Blue Guides asked Nigel McGilchrist, an art historian, to write a guide to the Greek islands, it never expected what it got – a manuscript that ran to nearly 600,000 words, three times the agreed length. McGilchrist's enthusiasm for his subject, which he researched for the best part of six years, was like a runaway horse.

SkiathosThe 53-year-old scholar, who has lectured on both sides of the Atlantic, lives in solitary splendour in Italy, in a farmhouse near Orvieto. In the great tradition of eccentric English expats, he keeps donkeys, produces his own olive oil and aspires to the philosophical mellowness of the Roman poet Horace. But the opportunity to write about his beloved Greece – he studied classics at Oxford – was too good to miss.

"I was commissioned to write the book at the start of 2003 and delivered the manuscript in late 2008," he says. "For a time, the project took over my whole life. But I was relishing the challenge. There was just so much to cover."

At the height of his research, he was visiting the Aegean all year round, in the dog days of winter as well as in the heat of high summer. He traipsed from archaeological site to archaeological site. He could hardly find a secluded beach or friendly taverna without making a note of it. He mugged up on classical texts and chatted to locals in modern Greek. Even the wildlife received his scholarly attention. He became a one-man encyclopedia, a modern Baedeker.

The publishers, aghast at his prolixity, set to work with a red pencil and eventually condensed his epic manuscript to a manageable length. But, for McGilchrist, the resulting book was such a shrivelled travesty of his original that he decided to buy back the rights and go it alone, publishing his manuscript in extenso under a separate imprint, much as a director might release his own cut of a movie that had been mauled by the studio.

McGilchrist's Greek Islands runs to 20 volumes, priced at £9.99 each. For lovers of the Aegean, it is as close to being the definitive guidebook to the region as you are ever going to get.

Ios

There is no volume on Crete, because there is already a Blue Guide to Crete; and Corfu and the Ionian Islands, to the east of mainland Greece, will have to wait for another day. But the islands of the Aegean – 70-odd in all, some barely inhabited, others popular tourist destinations – are charted in loving detail. From Kos to Rhodes, from Chios to Lesbos, from the Northern Dodecanese to the Lesser Cyclades, McGilchrist does not miss a trick.

The practicalities are all there: how to get to each island, where to stay, where to eat. But it is the other stuff, the richly textured descriptions of the landscape and the main archaeological sites, littered with learned footnotes, that makes the series so rewarding.

History, architecture and geography form a seamless whole. The island of Patmos is best known for the 11th-century Monastery of St John the Divine, which McGilchrist describes in lapidary detail. But he is not one of those dreary souls who are turned on by picturesque ruins but unmoved by nature. Readers are also taken on a long trek to a remote beach on the north of the island, where the pebbles at the water's edge have the brilliance of agates and the neighbouring island of Samos dances in the sun.

"The islands are so different in character that there was a constant sense of adventure," he says. "Some, like poor Mykonos, have their own airports and attract tourists in the tens of thousands. But others are totally unspoilt, with primitive roads and very few inhabitants. On one island in the Sporades I had to swim a quarter of a mile just to get to an archaeological site I was keen to see."

The "poor" with which Mykonos is damned says it all. Although McGilchrist naturally hopes that his guides will help spark a renewed interest in the Greek islands, he has no illusions about the harmful effects of mass tourism on islands such as Mykonos and Rhodes. "One beneficial effect of the downturn in the Greek economy will be that it will put a halt to some of the more unsympathetic developments. On some of the islands, there have been a rash of twee imitations of Cycladic architecture, which is a pity," he says.

MilosIf touristy Mykonos gets the thumbs down, Tilos in the Southern Dodecanese gets an enthusiastic thumbs-up. "It has only a few hundred inhabitants, but it has been blessed with a mayor with a passionate commitment to environmental conservation. He has banned all hunting on the island, which has led to a big increase in the numbers of rare raptors, like falcons and eagles. It is a great place for birdwatching."

McGilchrist's passion for the environment is obvious, but his attachment to Greece's ancient past is equally pronounced. "Having read The Iliad and The Odyssey as a student at Oxford, it was thrilling to discover how accurate Homer's descriptions are, nearly 3,000 years later. 'Rocky Chios' really is rocky. The 'wine-dark sea' is as apt a description now as then."

As the tireless McGilchrist roamed from island to island, he kept finding vestiges of Homeric heroes – such as the Greek archer Philoctetes, who was marooned on a small island for 10 years. "There is a reef, just east of Lemnos, which fits the bill perfectly."

With the odd exception, such as Rhodes, the islands of the Aegean do not boast major archaeological sites to rival the Acropolis in Athens or, for that matter, Ephesus in Turkey. But it is the lesser sites, with their clues to the long-dead past, that fascinate McGilchrist.

"On Milos, there is evidence of an Aegean-wide trade in obsidian – a super-hard volcanic glass – dating back to 9000BC. That is 8,000 years before sailing boats were invented. The traders must just have paddled from island to island. Milos is still rich in minerals today. There is nothing to beat exploring its coastline from a small boat and observing how the brilliantly coloured beaches create translucent opal waters."

AmorgosTravel the Aegean on a cruise ship and one island might seem much like another. A lot of the harbours are quite similar, the restaurant food is samey and that bright Aegean sun seems to suffuse the whole region, giving every hillside the same bleached quality.

But McGilchrist has an unerring eye for what makes island A different from island B. It might be something in the architecture – as in the exquisite little island of Symi, where Byzantine and Ottoman buildings can be found cheek-by-jowl with ruined windmills and a crusaders' castle. Or it might be something in the landscape.

Chios has "a rugged and dramatic coast" while neighbouring Lesbos –appropriately for the birthplace of the poet Sappho – has "a notably feminine quality" with "tranquil waters" and "beneficent mountain peaks" all contributing to the effect of "domesticity, spaciousness and calm".

For Hellenophiles such as McGilchrist, there are so many wonderful places, each with its own charm, that one could take a holiday on a different island every year for the rest of one's life. What advice does he have to offer for those who are exploring the islands for the first time?

"It is best to go in late spring or early autumn, if possible. There are too many tourists in high summer, when the Aegean is inundated with cruise ships. Some of the islands can also be stiflingly hot. Try to sample a range of islands, large and small, rather than staying put in one place. As a base for exploring the Aegean, Samos is probably as good as anywhere, simply because of its superb ferry connections. You are within striking distance of Chios, Lesbos, Lipsi, Patmos, Kalymnos, Ikaria, Fourni…"

And his personal favourite? "I am tempted to say Amorgos, which is quite delightful, but it would have to be Astypalaia, in the Southern Dodecanese," McGilchrist says. "It is not at all well known, but no other island in the Aegean feels so exhilaratingly spacious. Because of its remote location, Astypalaia attracts an extraordinary number of migrating birds, heading to and from North Africa. But it also boasts orchards, waterfalls, a beautiful hilltop citadel, some fabulous early Christian mosaics and a lovely cluster of traditional Cycladic houses."

McGilchrist talks so lyrically about the island that he makes you want to get on the next plane to the Aegean and check out Astypalaia for yourself. Other guidebooks to the Greek islands may offer more by way of glossy photographs, and tips on beaches and bars showing Sky Sports, but none of the rest is quite so obviously a labour of love.

In an age when most travel guides are growing obsessed with cost-cutting, it is a publishing enterprise on a Homeric scale.

Author: Max Davidson | Source: The Telegraph/UK [February 19, 2011]


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Roman Childs Footprints Found


This page is viewed 614 times Sky News

Two thousand year old footprints left by a Roman child playing by the side of a road have been found in North Yorkshire.

Roman child's footprint. Photo: Northern Archaeological Associates

Archaeologists made the remarkable discovery while excavating a muddy area of a former Roman settlement on the A1 near Leeming. Helen Maclean of archaeology firm AECOM described the find as very rare.

"I'm not aware of many other footprints being found, everybody was quite amazed by it," she said.

Photographs show a right footprint clearly visible in soft ground followed by two left prints - suggesting that the boy or girl who made them was hopping or skipping.

The perfectly-preserved footprints were uncovered in 2010 during a dig at Healam Bridge, but photographs have only now been released after Sky News heard of their existence.

The site was excavated as part of a ?318m Highways Agency scheme to upgrade part of the A1 to a three-lane motorway.

The area where the child had been playing was close to a stream where archaeologists believe the Romans struggled to keep their feet dry.

Experts found evidence of repeated attempts to make the area less muddy, with stones and plant material spread on the soft ground.

"It was quite close to where the stream probably ran", said Ms Maclean.

"The child was probably running through the mud, jumping in puddles or possibly just trying to avoid getting its feet wet."

The dig was close to an imperial fort which served as a frontier outpost for the famous Ninth Legion which took part in the Roman invasion of Britain in AD43.

The Highways Agency released photographs and drawings of an industrial complex found on the site with a water powered flour mill used to grind grain and produce food for the nearby Roman garrison.

Archaeologists were unable to preserve the footprints and the photographs are the only evidence that remains of the child's brief skip through the Yorkshire mud.



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The Maya Archaeologists at Ceibal

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The Maya Archaeologists at Ceibal E-mail  
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Our team of researchers is international and interdisciplinary. Archaeologists and students come from the United States, Guatemala, Japan, Switzerland and Russia.

Jessica with her able assistant, Alfredo.

Each of them is in charge of an excavation operation, directing a group of workers and documenting excavation processes and finds. One exception is me - I'm not too ashamed to claim the privilege of the director in strolling from one operation to another, chatting with workers and taking pictures. In addition, a group of Japanese geologists and plant scientists are examining the past natural environment and climate through the analysis of lake sediments. In March, applied anthropologists from the University of Arizona and other institutions will join us to carry out a community development project at the Q'eqchi' Maya village of Las Pozas, where many of our workers come from. In total, 28 researchers and about 50 local workers make up our team for this year. The makeup of our team reflects the nature of archaeology - a mixture of diverse academic fields. Social science and anthropology make the core of our discipline, but archaeology also involves chemistry and material sciences for the analysis of ceramics and other remains, physical anthropology for the study of human skeletons, geology and soil sciences for the understanding of deposits, environmental sciences for the study of the past ecology, diet and resource use, as well as requisite familiarity with the intricacies of culture and history of the chosen regions. And organizational skills are critical in managing large research teams and in maneuvering through governmental and local political mazes. Each archaeologist struggles to balance the needs for deepening expertise in the areas of specialization and for widening knowledge in various related fields. Collaboration with various specialists is essential.

I am a social science type, interested in how Maya society was organized and changed, and at times am over-preoccupied with fuzzy, abstract theories. Dani, a Swiss who combines German perfectionism with Italian dynamism, specializes in ceramic studies and explores how and where certain ceramics may have been made and exchanged through the analysis of their chemical compositions. The good record-keeping of our project owes largely to her; all project members have learned by bitter experience that she does not tolerate any errors in excavation forms or artifact logs. In my case, such mistakes, which I tend to commit rather frequently, can have dire consequences - I have to fear a night on the floor, as she is my wife. Dani also ensures the well-being of project members by extending her relentless pursuit of perfection to camp hygiene and the disinfection regimen of our food.

Kazuo Aoyama, who heads the Japanese-financed research, is a tireless lithic analyst. Konjou (guts!), kiryoku (will-power!!), shinukide-yaru (success or death!!!). Those are the mottos that drive Kazuo through tens of thousands of stone artifacts as he measures them, classifies them and examines their use-wear under the microscope to determine how and on what material stone tools were used. For him, even meals and sleep are part of work; he ingests nutrients and recharges energy, all for the sake of tomorrow's analysis, with the same intensity and earnestness that he applies to his beloved obsidian and chert. His thundering outpour of vigor leaves all the rest of us in awe. The only time Kazuo diverts his attention from work is when he makes the daily call to the three women of his life in Japan - his Honduran wife, Vilma, and their daughters, Sakura and Michiko - still with uncompromised intensity and earnestness.

Such directions are usually chosen during one's graduate training. Jessica MacLellan, our second-year grad student from the University of Arizona, is interested in Preclassic Maya architecture. Her first assignment of this season was to excavate a small unit behind the East Court, which was a large platform during the Preclassic period and reused as the royal palace toward the end of the Classic period. I thought that in this area we would hit the bedrock soon below the surface and would easily get an idea about how much deeper we have to dig in the excavations of the East Court. I was too optimistic. What Jessica found was a condensed version of Ceibal's long occupation history. Under the midden (where food refuse and other trash were thrown) associated with the Classic-period royal palace, Jessica found a powdery, white layer. I told Jessica that it was probably soil from before human occupation. I was wrong. It turned out to be an eroded Preclassic structure. Underneath it, she revealed an older construction. I hope that this excavation gave her a good introduction to Ceibal. During this season and the next, Jessica will need to develop a plan for her own dissertation research that should be manageable as a student project, yet have an impact on the field.

Another student, Ashley Sharpe, is a zooarchaeologist from the University of Florida - one who analyzes faunal remains, including shells and animal teeth and bones, to reconstruct past diet, resource use and environment. She also dug a small pit near the East Court, which revealed a sequence as complex as Jessica's. Ashley has found two Preclassic caches (ritual deposits of ceramic vessels) and a midden. These deposits give us important information about the function of the Preclassic platform. Ashley's dissertation plan is fairly clear: she will examine animal remains from Ceibal and other Maya sites, focusing on the Preclassic period. It may be a good omen that this midden contained faunal remains, including tiny fish bones.



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Update on the current state of antiquities | Zahi Hawass

A log of news items about archaeology of the ancient Mediterranean--Egypt, the Aegean, Greece, Rome.

This site is maintained by Francesca Tronchin.

Updated almost daily.

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NASA assembles picture of solar system from the inside out

What would our solar system look like if visitors from other worlds took a series of pictures? NASA's MESSENGER spacecraft did just that by piecing together the first portrait of our solar system from the inside looking out. Comprised of 34 images, the mosaic provides a complement to the solar system portrait--from the outside looking in--taken by Voyager 1 in 1990.

MESSENGER

"Obtaining this portrait was a terrific feat by the MESSENGER team," says MESSENGER principal investigator Sean Solomon, of the Carnegie Institution of Washington. "This snapshot of our neighborhood also reminds us that Earth is a member of a planetary family that was formed by common processes four and a half billion years ago. Our spacecraft is soon to orbit the innermost member of the family, one that holds many new answers to how Earth-like planets are assembled and evolve."

MESSENGER's Wide Angle Camera (WAC) captured the images on Nov. 3 and 16, 2010. In the mosaic, all of the planets are visible except for Uranus and Neptune, which--at distances of 3.0 and 4.4 billion kilometers--were too faint to detect. Earth's moon and Jupiter's Galilean satellites (Callisto, Ganymede, Europa and Io) can be seen in the WAC image insets. The solar system's perch on a spiral arm of the Milky Way galaxy also afforded a beautiful view of a portion of the galaxy in the bottom center.

"The curved shape of the mosaic is due to the inclination of MESSENGER's orbit from the ecliptic, the plane in which Earth and most planets orbit, which means that the cameras must point up to see some planets and down to see others," explains imaging team member Brett Denevi of the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Md. "The images are stretched to make it easier to detect the planets, though this stretch also highlights light scattered off of the planet limbs, and in some cases creates artifacts such as the non-spherical shape of some planets."

Assembling this portrait was no easy feat, says Solomon. "It's not easy to find a moment when many of the planets are within a single field of view from that perspective, and we have strong Sun-pointing constraints on our ability to image in some directions."

APL's Hong Kang, from MESSENGER’s guidance and control team, used the Jet Propulsion Laboratory's Solar System Simulator to pinpoint the relative positions of MESSENGER and the planets to determine if it was possible to see the planets from MESSENGER at any given time.

"I used the celestial coordinates of the planets at the time I wanted to observe them to verify with simulations that MESSSENGER could see each of the planets," Kang explains. "I also used a satellite tool kit to verify that we had the planets in the field of view of MESSENGER’s Mercury Dual Imaging System."

The MESSENGER team then had to determine how long the exposures needed to be for each planet.

"From exposure times that worked for previous imaging of stars with visual magnitudes similar to those of the planets, we chose exposure times that would allow us to obtain the appropriate number of counts (i.e., amount of light) in each planet image," explains APL's Nori Laslo, the mission's Operations Lead and Instrument Sequencer for MDIS.

"We decided to take images using both the Narrow Angle Camera and the Wide Angle Camera for each planet so that we would cover the sky surrounding the planets and also image the planets themselves at as high a resolution as possible," she adds. "I took all of these parameters, along with a variety of related settings, and began building the command sequence with the library of MDIS commands that we have to configure and control the camera system."

Robin Vaughan, who worked with Kang to coordinate the pointing and timing of the MDIS, also played a role in Voyager's portrait.

"I was working as an optical navigation analyst at JPL for the Voyager Neptune encounter," says Vaughan, the lead engineer for MESSENGER's guidance and control (attitude control) subsystem at APL. "I had to plan and generate the pointing commands for pictures of Neptune and its satellites against background stars that we used to improve our estimate of the spacecraft's trajectory leading up to the Neptune encounter. Voyager's solar system portrait was done a few years after that flyby and was coordinated by the imaging team. Our optical navigation image planning software was used to double check the pointing commands they had designed and confirm what they expected to see in each image."

Vaughan did the same thing for MESSENGER’s portrait, using Kang’s designs. "I used the SPICE trajectory files for the spacecraft generated by MESSENGER's navigation team, as well as routines in the SPICE toolkit, to write a software program that would identify windows when each of the planets would be visible to MDIS given the constraints on pivot angle and Sun keep-in zone for spacecraft attitude," she says.

From a technical standpoint, the MESSENGER portrait was a little more complicated than what was done for Voyager because we had to stay within the Sun keep-in constraints. "With Voyager so far out in the solar system, the Sun is much fainter and there were no constraints on the overall spacecraft attitude as far as the Sun was concerned," Vaughan says. "Being in the inner solar system, MESSENGER has to constantly keep the sunshade pointing toward the sun, which limits the periods when the different planets can be viewed even with the extra degree of freedom that MDIS has with its pivot capability."

Denevi says the experiment was humbling. "Seeing our solar system as just these little specks of light, it reminds you of how lucky we are that we've had the chance, through so many missions, to get up close and explore the incredible diversity and geology that each planet and moon displays," she says. "Mercury has been just a dot on the horizon for most of history, and we get to fill in the details and know it as a real world. What an amazing opportunity!"

Source: NASA [February 18, 2011]


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jiajing pottery

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El Mirador, Guatemala: Saving the Cradle of Mayan Civilization

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El Mirador, Guatemala: Saving the Cradle of Mayan Civilization E-mail  
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At the heart of the Maya Biosphere Reserve in northern Guatemala, shrouded by the last tract of virgin rainforest remaining in Central America, lies what many archaeology experts refer to as the Cradle of Mayan Civilization.

Danta Pyramid

Known officially as the Mirador Basin, the site is home to dozens of Mesoamerica's earliest, largest, and most striking examples of Preclassic Mayan civilization, as well as La Danta, the largest pyramid by volume in the world. But according to the World Wildlife Fund, the Maya Biosphere has lost 70 percent of its forests in the last decade, and El Mirador itself has been threatened by wildfires, looting, poaching, narcotics trafficking, and other dangers. Since 2003, Global Heritage Fund (GHF) has been working in Mirador to protect its priceless ancient cities and monuments and preserve the site for future generations. Led by project director Dr. Richard Hansen, founder and president of the Foundation for Anthropological Research and Environmental Studies (FARES), GHF primary goal is to establish a new 880,000-acre national park in the area and continues to work with local communities like nearby Carmelita to ensure Mirador's integrity and sustainability. In 2010, after completion of site conservation, El Mirador opened to the public for the first time.

THREATS TO MIRADOR

For decades, Mirador has been plagued by an array of threats. Chief among these is deforestation, caused in large part by drug trafficking profits which have fueled a massive ranching industry that requires large areas of jungle to be cleared, and which have virtually destroyed the Maya Biosphere. Forest is also cleared for agricultural purposes, generally in a slash-and-burn practice that employs fire to clear the land. This practice has been so extensive, though, that the intensity of the fires and the resulting smoke has forced the closure of schools as far north as Texas. (Global Heritage Network (GHN) GHF's new early warning and threat monitoring system for endangered sites in the developing world, has been used to track wildfires.)

Illegal logging has also had a devastating effect on the Mirador Basin, as looters and poachers not only hack through forest to navigate the site, but consequently block access roads needed to clear fallen trees. Looters, as well, have targeted and compromised virtually every site in the Mirador Basin, seizing their piece of a Mayan artifacts-trafficking industry that accounts for millions of dollars in the collecting markets each month (though extremely little of this lands in the pockets of looters). Indeed, only a fraction of the sites at Mirador have been studied by archaeologists thus far, and according to Dr. Hansen, "By the time scholars get there, looters may already have plundered them."

GHF PROGRESS

When GHF began work at Mirador in 2003, its primary conservation goals were to establish permanent protection for the Mirador Basin, create a sustainable protected area within 10 years, and aid the Guatemalan government in securing a UNESCO World Heritage Site inscription for the 880,000 acre site, the largest of its kind in Central America. In 2011, GHF continues its preparations for the Archaeological Management Plan for the Mirador Natural and Cultural System, while extensive mapping of all major sites and causeways continues.

Conservation efforts at Mirador have been aimed predominately at stabilizing and preserving the site's most significant monuments, including the complex of La Danta, the pyramid of El Tigre, and a building known as "Jaguar Paw Temple." In 2010, GHF completed site conservation, and El Mirador opened to the public for the first time.

"Preservation by Design" is how GHF terms its integrated conservation and development methodology - a living framework that combines long-range planning, conservation science, community engagement, and monitoring and evaluation to ensure the future sustainability of each project site. At Mirador, GHF has equipped and trained 60 guides in the community association and funded Mirador's 30 park rangers who have been relied upon to police illegal activities taking place within the protected area. In the gateway village of Carmelita, the town's first ever water system has been implemented and a Visitor Center opened. GHF has also provided 45 computers with custom-designed courses for students and adults on conservation, nature, wildlife, archaeology, history, tour guiding and park ranger training.

"It is a great privilege to partner with Global Heritage Fund in our efforts to save Mirador, a nearly one-million-acre natural and cultural protected area," says Fernando Paiz, Chairman of The Foundation of Cultural and Natural Maya Patrimony (PACUNAM). "Global Heritage Fund's Preservation by Design methodology and technical expertise in master planning and building international partnerships has helped to create a sustainable framework to increase food production and bring access to financing for thousands of hunger-afflicted people."

PARTNERS IN CONSERVATION

GHF's main partners on the Mirador project have been FARES, founded by project director and eminent archaeologist Dr. Hansen, who in 2005 was given the National Order of the Cultural Patrimony of Guatemala, and PACUNAM, an association that includes some of Central America's leading businesses. Serving as a new model for private-public partnerships, PACUNAM looks to become Guatemala's leading foundation in the preservation of Mayan natural and cultural heritage by combining the efforts of companies, businessmen, and individuals. This is the first time that major industrial groups have combined forces in Guatemala to realize a major new national park and conservation program for cultural and natural heritage of the country.

Mr. Paiz, former Chairman of the Board of Trustees for Wal-Mart Central America, says, "Global Heritage Fund has enabled our entire country- top companies, foundations, the government and community stakeholders- to work together towards a common vision for the successful long-term conservation of Mirador. GHF's expertise in planning, partnerships and community development has been critical to our success."

Kurt Vogt, Managing Director of Citi Latin America, says, "For five years, Citibank has entrusted Global Heritage Fund with our resources to preserve heritage and bring the benefits of economic development from heritage to the poorest regions of the world. Thanks to our continued partnership, Citi's investments are enabling large-scale conservation and sustainable development of major sites like Mirador."

In 2009-2010, GHF received significant support and funding from its project partners, including the United States Department of the Interior, which secured approximately $1 million for conservation and other related projects in the Mirador Basin. The Foundation for Sustainable Development (FUNDESA) granted $1.2 million in funding for tourism development and community infrastructure, while GHF itself secured $6 million to go along with $3 million from the Guatemalan private sector (PACUNAM) and $4 million from the Guatemalan government and IDB for training and park infrastructure.

The Guatemalan government is committing major new investments in park infrastructure, social services, security, and park management. President Colom estimates that the project will generate thousands of new jobs and will be a critical initiative to stop the destruction of the Maya Biosphere Reserve.

JUAN CARLOS' STORY

Juan Carlos Calderon grew up in the village of Carmelita, a small and remote community of 200 bordering Mirador Rio Azul National Park in the Peten region of Guatemala. Uneducated, unemployed, and faced with basic human responsibilities of sheltering and feeding his family, Juan Carlos subsisted on a life of wildlife poaching and looting in the numerous Mayan ruins that surrounded his home. In dire circumstances like these, how could Juan Carlos be aware of the cultural and natural importance of these areas? How could he know that, if properly protected, these ruins could in turn help protect him and his family?

Since 2003, GHF has led an integrated program of planning, scientific conservation, community development and funding at Mirador. For the last five years, Juan Carlos has worked as a guard in the park. Today, with a job that provides him with a steady income, access to basic health care, and education opportunities (he has completed basic literacy programs at the Mirador Project camp), Juan Carlos now defends the very assets he plundered for much of his life. Most importantly, thanks to his new income, his eldest son Enrique completed high school and is studying law at university in Guatemala City.



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Jericho’s skyscraper sought to intimidate masses

The world’s first skyscraper was built by early farmers, who were frightened into erecting a solar marker by mankind’s early bosses, archaeologists say.

41_jericho tel 7000BCLong before its Biblical walls came tumbling down, Jericho’s residents were being enticed to give up hunting and gathering and start farming for a living. They settled in this oasis next to the Jordan River and built a mysterious 8.5-meter (28-foot) stone tower on the edge of town.

When discovered by archaeologists in 1952, it was dated at over 11,000 years old, making it the first and oldest public building even found. But its purpose and the motivation for erecting it has been debated ever since.

Now, using computer technology, Israeli archaeologists are saying it was built to mark the summer solstice and as a symbol that would entice people to abandon their nomadic ways and settle down.

“The tower was constructed by a major building effort. People were working for a very long time and very hard. It was not like the other domestic buildings in Jericho,” said Ran Barkai of the Department of Archaeology at Tel Aviv University, who was part of a team that did the computer analysis.

The stone tower is about nine meters in diameter at its base and conical in shape. Built out of concentric rows of the stones, it also contains an enclosed stairway. Archeologists say it wasn’t used as a tomb.

Barkai and fellow archaeologist Roy Liran used computers to reconstruct sunsets and found that when the tower was built the nearby mountains cast a shadow on it as the sun set on the longest day of the year. The shadow fell exactly on the structure and then spread out to cover the entire village.

“The tower is an indication of power struggles at the beginning of the Neolithic period and of the fact that a particular person or people exploited the primeval fears of the residents and persuaded them to build it,” Barkai told The Media Line.

Barkai said architecture designed to awe and inspire, and without any obviously functional purpose, isn’t unique to the megalithic period. Even today, governments erect monuments like the Arc de Triomphe to influence public opinion and enhance their standing.

The period when the tower was built was a time when people started to put down literal roots by abandoning hunting and gathering and taking up farming. But, according to Barkai, people didn’t make the transition easily because farming was actually a harder way of life.

“This was a time when hierarchy began and leadership was established. This was the time that social formations took place and many scientists have wondered why people were moved to produce food, to make the transition to agriculture,” Barkai said. “Agriculture worked for the benefit of certain individuals in the community, because people produce surplus that was stored and then divided by individuals.”

“It has been proven that people worked much harder during the Neolithic period than before. It was easier to live by hunting and gathering so we believe this tower was one of the mechanisms to motivate people to take part in a communal lifestyle,” he said.

Mysteriously, the tower was built on the outskirts of town and not as part of the fortifications of the city, which was the world’s first.

A tower was something so alien to their conceptual world of the builders, who had probably never seen or could conceive of such a building, that it must have served more than a defensive purpose, Barkai reckoned.

He backed this up with historical records indicating that no invaders were present in the area at the time it was built, about 8300 BC. According to archaeological estimates, it took about 11,000 working days to build it.

“It is something out of time and place and looks like it doesn’t belong where it was. It was a monumental effort to build, like the pyramids [built 5,000 years later], only among a village of former hunters and gatherers,” Barkai said.

Author: Arieh O’Sullivan | Source: The Jerusalem Post [February 14, 2011]

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Scientists warn that Earth could be unrecognizable by 2050

For all the talk of economic stagnation in the U.S., you could pick a worse time to live in parts of the developing world. Average worldwide income is expected triple over the next 40 years. And in developing nations that figure could jump 500 percent.

EarthThe global infant mortality rate has more than halved over the past 40 years, according to the World Bank.

Technological advances and economic liberalization have opened a whole new world of opportunity for billions who only decades ago would have been abandoned to extreme poverty.

Then Thomas Malthus rears his ugly head, and his warnings of the dangers of population growth are like a post-historic Hydra.

As the global population surpasses 7 billion this year -- experts expect that figure will surge to 9 billion by 2050 -- and standard of living rises, natural resources continue diminish.

All of this conspires to put additional pressures on a global ecosystem already buckling under the weight of human consumption.

According to scientists at the annual meeting of the American Association for the Advancement of Science, the confluence of precipitous demographic and environmental factors amount to a massive ecological bubble; one that, should it burst, could lead to catastrophe.

According to the World Wildlife Fund's Jason Clay:

[To feed everyone] we will need to produce as much food in the next 40 years as we have in the last 8,000. By 2050 we will not have a planet left that is recognizable.

As such, scientists at the AAAS meeting urged for more funding for global family planning initiatives to stem population growth, especially in the developing world, as well as reforms to food production practices.

Whether there's the political will in nations like the United States -- especially at a time when Congress is slashing foreign aid expenditures -- remains to be seen.

Author: Peter Finocchiaro | Source: Salon.com [February 21, 2011]


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Tang Tricolor Pottery of China

Tang Tricolor Pottery of China

As a colored pottery craft prevailing in the Tang Dynasty, Tang tricolor pottery takes yellow, brown, and green as its basic glaze colors, so it is named “Tang tricolor pottery” (Tangsancai). It is known for its vivid design, flamboyant color and luster, and rich life ambiance.

Tang Tricolor Pottery Tang Tricolor Pottery

The images of the Tang tricolor pottery are rich and colorful. Generally speaking, they can be classified into several types: the first type is human figures, which are usually of high stature, some 70 or 80 centimeters, and some can reach as high as over 100 centimeters; the second type is the figures of animals, of which the horses and camels are the most eye-attracting; the third type is living utensils, the commonest of which are the utensils closely related to life, such as plates, bowls, kettles, bottles, etc; the fourth type is the models, which are used as articles to be buried with the dead.

Another feature of the Tang tricolor pottery is its color. The practice of applying simultaneously the three glaze colors – red, green and white – to the same article was initiated in the Tang Dynasty. The craftsmen skillfully employed the three colors and fired the pottery in high temperature. After the pottery come out of the kiln, it can take on a colorful appearance with the glaze colors intermingled in between.


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Protecting Pharaonic heritage

The pictures told a thousand stories of horrors and would-be horrors. Special forces soldiers standing guard, fully armed, in the middle of the Egyptian Museum, amidst some of the most treasured legacies of humankind.

Egypt_ProtestsYes, the scenes were from the day after at Cairo's world-famous home to the treasures of the Pharaohs that was attacked by a mob. The would-be looters broke into the museum while the nation's attention was riveted on the Tahrir Square protests, ripping the heads of two mummies and damaging some 75 rare artefacts before being stopped by soldiers and apprehended.

I couldn't control my anger — nor the tears that welled up in my eyes — as I watched on television this vandalism that targeted antiquities that are the envy of the whole world.

The unquestioned doyen of Egypt's antiquities, Dr Zahi Hawass, Director of the Supreme Council of Antiquities, who was also recently promoted to minister of state, rushed to the scene and reported that despite the damage caused, nothing was missing from the collection and that the prized collection was now safe under military guard.

As an Arab, extremely proud of his heritage, I cried because the incident brought back memories of what had happened in Iraq in 2003 soon after the US-led war to topple Saddam Hussain began, and the more brazen, televised destruction of the Buddhas of Bamiyan by the Taliban in Afghanistan in 2001.

The sight of looters of Iraq's Mesopotamian treasures was amazing for George W. Bush at that time, but that did not stop the relentless pillage that followed under the very noses of the American occupation forces. Priceless artefacts have been smuggled out into the international black market, many never likely to be recovered again.

Cairo proves that history shamelessly repeats itself, but not always in the manner predicted or feared. Senseless acts of vandalism, often driven by baseless denial of humanity's legacy, are not uncommon during social-political turmoils of the kind one has witnessed in Egypt over the past many weeks.

Sometimes lax security and bureaucratic indifference encourage such incidents. Last year, the theft of a Van Gogh painting from a museum in Cairo brought attention to outdated alarm and camera systems and other troubling lapses in security.

Hawass has long campaigned to bring home ancient artefacts spirited out of the country during colonial times. Last month, just before anti-government protests erupted, he formally requested the return of the 3,300-year-old bust of Queen Nefertiti that has been in a Berlin museum for decades.

Seven sites are classified as World Heritage in Egypt, but there are hundreds of archaeological sites. These are most at risk. As foreign researchers fled the country and neighbourhood fires threatened the Cairo Museum this month, Hawass told Irina Bukova, the Unesco Secretary General, that "all necessary measures have been taken to safeguard the treasures of Egypt, especially in Cairo, Luxor and other historical sites …"

In reality, though, there can be no guarantees in such matters. Revolutions have always led to excesses of ignorance, and the losses of each have proved disastrous to humanity as a whole. During the French Revolution, the revolutionaries destroyed 28 statues of the kings of Israel and Judah that adorned the facade of Notre Dame, because they mistakenly believed they were of the kings of France.

Archaeologists around the world were horrified at the pillage of the principal Pharaonic museum, which has some 120,000 exhibits. Shockingly, members of the tourism security forces themselves were among the vandals, according to museum director, Wafaa Al Sadiq (quoted by Der Tagesspiegel magazine).

However, French archaeologist Jean-Pierre Corteggiani was encouraged to see that dozens of Cairenes volunteered to form a security chain around Cairo Museum to prevent further depredations. Hawass has declared on Al Jazeera TV that the army had taken control of the damaged tombs at Saqqara, saying "We cannot be like Afghanistan." But Philippe Collombert, head of the French archaeological mission in Saqqara, is not satisfied, pointing out to gangs of looters digging around the site.

Hawass has recognised only one other incident of pillage in the provinces, at a museum depository in Port Said. "We do not know exactly how many objects were taken, but a total of six boxes have disappeared. They contained inventories from the site of Qantara, in Sinai," said Jacques Kinnaer, a Belgian Egyptologist and founder of Egyptian cultural heritage website that disseminates information on the country's stolen treasures.

"Port Said has recovered 288 objects and I'm sure others will be returned," Hawass has promised. It is reassuring that many of Egypt's museums and ancient monuments, including the Pyramids of Giza, are secure despite upheaval in the streets, and the authorities managed to recovered nearly 300 archaeological items that were plundered by armed Bedouin in the Sinai Peninsula.

Kinnaer has urged officials around the world, art dealers, collectors, and in general anyone who felt affected by this tragedy, to be on the look out for objects that they suspect could have been from Egypt. In the all-consuming turmoil that engulfed Egypt, it had fallen on the rest of the world to take on the challenge of protecting civilisation's most cherished heritage.

Author: Shakir Noori | Source: Gulf News [February 20, 2011]


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Starless planets may be habitable after all

LIQUID water may survive on free-floating planets that have no star to warm them. If they also support life, they could act as stepping stones to spread life around the galaxy.

RoguePlanetGravitational tussles with other planets or passing stars can eject planets from their solar systems. But even in the cold of space, these wayward worlds could stay warm, thanks to the decay of radioactive elements in their rocky cores.

Dorian Abbot and Eric Switzer of the University of Chicago calculate that rocky planets with a similar mass to Earth could remain warm enough to keep water liquid under thick, insulating ice sheets for over a billion years.

A planet with the same fraction of water as Earth could keep a subsurface ocean liquid if it was 3.5 times Earth's mass. But a planet with 10 times Earth's water concentration could do this if it weighed just one-third as much as Earth, they say (arxiv.org/abs/1102.1108).

"It's a really interesting idea," says Lisa Kaltenegger of the Harvard-Smithsonian Center for Astrophysics. "But we would have to land on [a planet] and burrow down to see if life is possible."

Source: New Scientist [February 20, 2011]


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Quest for Extinct Giant Rats Leads Scientists to Ancient Face Carvings


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Ancient stone faces carved into the walls of a well known limestone cave in East Timor have been discovered by a team searching for fossils of extinct giant rats.

Grou.p of petroglyphs in Lena Hara Cave, East Timor (Credit: John Brush)

The team of archaeologists and palaeontologists were working in Lene Hara Cave on the northeast tip of East Timor. "Looking up from the cave floor at a colleague sitting on a ledge, my head torch shone on what seemed to be a weathered carving," CSIRO's Dr Ken Aplin said.

"I shone the torch around and saw a whole panel of engraved prehistoric human faces on the wall of the cave.

"The local landowners with whom we were working were stunned by the findings. They said the faces had chosen that day to reveal themselves because they were pleased by the field work we were doing."

The Lene Hara carvings, or petroglyphs, are frontal, stylised faces each with eyes, a nose and a mouth. One has a circular headdress with rays that frame the face.

Uranium isotope dating by colleagues at the University of Queensland revealed the 'sun ray' face to be around 10,000 to 12,000 years old, placing it in the late Pleistocene. The other faces could not be dated but are likely to be equally ancient.

Lene Hara cave has been visited by archaeologists and rock art specialists since the early 1960s to study its rock paintings, which include hand stencils, boats, animals, human figures and linear decorative motifs. The age of the pigment art in Lene Hara is currently unknown but a fragment of limestone with traces of embedded red ochre was dated previously by Professor Sue O'Connor of The Australian National University to over 30,000 years ago.

Although stylised engravings of faces occur throughout Melanesia, Australia and the Pacific, the Lene Hara petroglyphs are the only examples that have been dated to the Pleistocene. No other petroglyphs of faces are known to exist anywhere on the island of Timor.

"Recording and dating the rock art of Timor should be a priority for future research, because of its cultural significance and value in understanding the development of art in our past," Professor O'Connor said.



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Pollution triggers genetic resistance mechanism in a coastal fish

For 30 years, two General Electric facilities released about 1.3 million pounds of polychlorinated biphenyls (PCBs) into New York’s Hudson River, devastating and contaminating fish populations. Some 50 years later, one type of fish — the Atlantic tomcod — has not only survived but appears to be thriving in the hostile Hudson environment.

PollutionFishResearchers from Woods Hole Oceanographic Institution (WHOI) have joined colleagues from New York University (NYU) and NOAA to investigate this phenomenon and report that the tomcod living in the Hudson River have undergone a rapid evolutionary change in developing a genetic resistance to PCBs.

Although this kind of reaction has been seen when insects develop resistance to certain insecticides, and bacteria to antibiotics, “This is really the first demonstration of a mechanism of resistance in any vertebrate population,” said Isaac Wirgin of NYU’s Department of Environmental Medicine and leader of the study. Moreover, he said, the team has found that “a single genetic receptor has made this quick evolutionary change possible.”

The findings, reported online in the Feb. 17 issue of Science, provide a first look at “natural selection going on over a relatively short time, changing the characteristics of a population,” said WHOI Senior Scientist Mark E. Hahn, who, together with WHOI biologist Diana Franks, collaborated with Wirgin on the study.  “It’s an example of how human activities can drive evolution by introducing stress factors into the environment.”

PCBresistanceLooking at the ability of the fish to respond to the contaminants, the researchers found the primary changes occurred in a receptor gene called AHR2, which is important in mediating toxicity in early life stages and can control sensitivity to PCBs. In his work over the last 16 years in the Acushnet River Estuary near New Bedford, Mass., biologist Hahn has found the same gene involved in controlling other fishes’ responses to PCBs.

The AHR2 proteins in the Hudson Rover tomcod, he said, appear to be missing two of the 1,104 amino acids normally found in this protein. This causes the receptor to bind more weakly with PCBs than normal, suggesting a reason why the contaminant does not affect the tomcod in this location as much as it does tomcod in other locations. The Hudson River tomcod “are not as sensitive to PCBs,” Hahn said. “The mechanism by which PCBs cause toxicity is dampened in this population.”

While this may be good news for the tomcod, it may bode not so well for their predators, and even humans. “The tomcod survive but they still accumulate PCBs in their bodies and pass it on to whatever eats them,” Hahn said.

PrintWirgin noted that tomcod spawn in the winter, and in the summer become “a major component of the diets of striped bass and other fish.” This can lead to “an abnormal transfer of contaminants up the food chain,” perhaps all the way to humans who may consume them.

In addition, the tomcod’s genetic changes “could make them more sensitive to other things,” and affect their ability to break down certain other harmful chemicals, such as PAHs (polycyclic aromatic hydrocarbons), Hahn said. “So it’s conceivable that the Hudson River tomcod could be more susceptible to PAHs because it cannot degrade them properly,” he said.

Also, he added, these receptors are involved in normal development, and a genetic change could lead to a change in a fish’s health. “There could be evolutionary costs,” Hahn said. “We don’t know yet what they are but it’s something that needs to be considered.”

“Hudson River tomcod have experienced rapid evolutionary change in the 50 to 100 years since release of these contaminants,” the researchers say in their paper. Added Wirgin: “Any evolutionary change at this pace is not a good thing.”

PrintIronically the recently begun EPA-mandated cleanup of Hudson River PCBs could be trouble for the tomcod. If there are evolutionary costs to having the variant AHR2 gene, the absence of the toxic substance that triggered its adaptation might leave it at a disadvantage.

“If they clean up the river,” Wirgin said, “these fish may need to adapt again to the cleaner environment.”

The WHOI portion of the study was funded by an NIH Superfund Research Program Center grant through the Superfund Research Center at Boston University.

The NYU work was funded by an NIH Superfund Research Program individual grant and an NIH Environmental Health Sciences Center grant.

"This research could not have been attempted without the unique multidisciplinary focus of our funding vehicle, Superfund Basic Research," Wirgin said.

Source: Woods Hole Oceanographic Institution [February 17, 2011]


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Finally! A photo of the so-called statue of Caligula discovered...

A log of news items about archaeology of the ancient Mediterranean--Egypt, the Aegean, Greece, Rome.

This site is maintained by Francesca Tronchin.

Updated almost daily.

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Bas-Relief of a sacred character discovered by Mexican archaeologists at El Tajin

A fragment of a sculptural tableau that represents a character with 2 left arms, which might have been attached 1,100 years ago to the façade of the Niches Pyramid, was discovered by researchers of the National Institute of Anthropology and History (INAH) in El Tajin Archaeological Zone, Veracruz.

Bas_MexicoThe finding took place in late 2010 in the bed of a stream located 100 meters to the west of the pyramid, when rain uncovered a fragment of sandstone (86 by 61 centimeters and 15 cm thick) with a bas-relief scene partially eroded.

Its similarity with other tableaux, the last of them found in 1980 at Niches Pyramid, point out that the one recently discovered must have been exposed at the structure in late Epi Classic period and early Post Classic, between 900 and 1200 of the Common Era, declared archaeologist David Andrade Olvera, who works at El Tajin.

“The bas-relief character is depicted with his face in profile and torso to the front, showing 2 left arms represented one under the other, but we cannot clearly see where the right arm is.

“This representation of the human body is associated with the sacred world, and although it presents elements like the google eyes and fangs, the eroded image does not clearly depict it is Tlaloc”, declared the chief of Legal Protection of the archaeological zone.

The fragment of tableau, which currently undergoes deeper investigation, could be exposed temporarily at the El Tajin Site Museum, as the piece of the month in the second semester of 2011, and will probably become part of the permanent collection of the museum.

When describing the iconographic elements of the finding, Andrade remarked there are similarities with other tableaux, as well as unique elements, such as the fact that “it carries a rectangular headdress that resembles the one by the character of Tableau 28 at Niches Pyramid; nevertheless, the recently found fragment presents ear ornaments that are not depicted in other bas-reliefs at El Tajin”.

Besides a necklace of trapezoid beads and bangles, the anthropomorphic character wears a reticulated skirt girded with a double sash at the waist with a knot of fringes that hang at the front; this kind of tie is observed as well around one of the arms.

“In the back of the head, described the archaeologist, part of the body of a serpent is observed, with the scales realistically depicted, while frets of Tajin style are found to the left, and circular representations of jade beads are depicted at the bottom”.

Another aspect that does not resemble the pattern of Niches Pyramid tableaux is a symbol apparently suspended at the front of the character integrated by a disc with 3 beads inside and a tongue that hangs in the bottom.

Andrade explained that after the city was abandoned, the tableau might have detached from the pyramid and swept along by water flows; or else, it might have been intentionally detached and reused near the stream, falling into it later.

After exploration of the area where the fragment was found, to know the characteristics of the context, archaeologists sampled associated material and soil to conduct laboratory analyses. “To present, no other fragments have been found” concluded the expert.

Source: Art Daily [February 15, 2011]


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How to Evaluate Garage Sale Finds?

Posted by admin on February 24th, 2011

In this YouTube video, an antique store owner explains how to evaluate items find at garage sales. The video will help you identify the good and the bad at these sales so that you can always make an informed decision and get optimum value for your money spent on antiques and collectibles.

This entry was posted on Thursday, February 24th, 2011 at 3:35 am and is filed under Videos. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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china Plain Tri-colored Glazed Porcelain

china Plain Tri-colored Glazed Porcelain

The making of plain tri-colored glazed porcelain in the Ming Dynasty consisted of two steps. First of all, drawings and patterns of various kinds were carved into the porcelain flan without a ceramic glaze, which was then fired at a high temperature. After that, drawings and patterns of various kinds were colored and fired at a low temperature. Except for the three major colors, white and black were also frequently employed. As a kind of porcelain, the plain tri-colored glazed porcelain is different from the tri-colored glazed pottery of the Tang Dynasty (618-907), which is a low-melting glazed pottery.

china Plain Tri-colored Glazed Porcelain china Plain Tri-colored Glazed Porcelain

Plain tri-colored glazed porcelain utensils from the Ming Dynasty include three-legged bowls and furnaces. By the time of Kangxi, plain tri-colored glazed porcelain prevailed. The products, which were usually vividly sculpted, included bowls, plates, stationeries and stoves. Sometimes, even the Kwan-yin Statues and incense burners employed this art, which was more exquisite and the base colors more varied, including yellow and green bases. There was also a tiger-skin tri-colored glazed porcelain, which was made by dappling yellow, green and purple. During the firing process, the porcelain would naturally form a pattern likening that of a tiger’s coat.

Of all the tri-colored glazed porcelain, ink-base tri-colored porcelain, which became popular during Kangxi’s reign, is the most exquisite and precious.


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Remains of palatial compound


This page is viewed 370 times Gulf News

When engineers working near Candlestick Park last March drilled deep into the ground for soil samples, they pulled up chunks of wood and figured it was an old pier.

A view of Al Zubarah excavation site

The well-preserved remains of a palatial compound are among the new findings from the ongoing archaeological excavations in the abandoned town of Al Zubarah, situated on the northwest coast of Qatar, Gulf Times has learnt. Al Zubarah, which bustled with activity 200 years ago, is considered perhaps the best preserved example of a mid-18th to the end of 19th century pearl fishing and trading town.

"Though Al Zubarah is quite recent in terms of archaeology, it is a crucial location for the history of Qatar because it was the nation's largest town with at least 6,000 inhabitants at its heyday," Qatar Islamic Archaeology and Heritage (QIAH) project's deputy fieldwork director Dr Tobias Richter said.

QIAH is an initiative of Qatar Museums Authority (QMA) chairperson HE Sheikha Mayassa bint Hamad bin Khalifa al-Thani and vice-chairperson Sheikh Hassan bin Mohamed al-Thani as part of a major programme to investigate and protect Al Zubarah's rich archaeological heritage.

As asked by QMA, teams from the University of Copenhagen are currently undertaking the third season of archaeological fieldwork at Zubarah and the surrounding hinterland with another four years of field research planned.

"Al Zubarah was for sometime one of the most important trading centres in the entire Gulf," pointed out Dr Richter, an assistant professor at University of Copenhagen's Department of Cross-Cultural and Regional Studies.

The palatial compound, which the expert listed among the new findings, is the largest fortified compound, measuring 100 by 100m, in Zubarah.

The compound, with towers at each corner is sub-divided into a number of courtyards.

"We are excavating one of these courtyard areas to find out what the building was used for. It is clearly an important facility, very likely used by the ruling family of the town," Dr Richter stated.

It should have been a really impressive structure, a palace at one point and it has some nice features inside.

"We found these hamams (baths), footprints on the floor of one of the rooms, matting impressions, and fallen roof beams that are still preserved. They are small findings but significant in terms of understanding the site," he said.

Three major areas are being currently excavated in Al Zubarah, all of them continued from last year, the second season (Autumn 2009-Spring 2010) of excavation.

The centre of the town is being excavated. There are a number of courtyard houses or standard family homes very typical for the region.

"Then we are excavating an area what we think is a souq or market area, which is turning out some rather interesting results for the future," Dr Richter said.

Findings suggest that the souq was in the same location for at least two or three phases of the occupation.

"The first thing we did in the first season (Winter and Spring 2009), was to do a topographic survey of the entire town, followed by mapping and detailing all the neighbourhoods, roads, squares mosques and palaces in the settlement and then we began excavations in a few locations targeting key areas of interest," he recalled.

This was in addition to the areas previously excavated by QMA.

"There is still much to learn about the site as a whole. We now think that the site has at least six phases of occupation, the first major phase is 1760s to roundabout 1811 when the town was attacked and burned.

Subsequently Zubarah was inhabited very sporadically then resettled in the middle of the 19th century for another 50 or 60 years.

"So the phases of occupation are quite short and in particular in the earlier phase, this is a very lucky situation for archaeologists, because not only was the town founded as a sort of a planned settlement, but it also was not changed much."

The total area is 60 hectares for the major settlement, and the later settlement is 13 hectares (during the mid 19th century, when it was resettled after the attack in 1811).

"Al Zubarah is not a site that existed without its surrounding landscape. All of northern Qatar is full of historic sites and settlements," Dr Richter maintained.

There are small forts, small villages, coastal villages, rural settlements, wells throughout the entire region and they all operated at one point in conjunction with Zubarah as it required food and water to support its pearl fishing and trading fleets.

The trading vessels went out into the Indian Ocean all the way to Bombay (now Mumbai) and to other places on the African coast.

"We are exploring these hinterland sites as well, but with non-intrusive methods," the expert said.



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Irish medieval fishing site will be lost to the tide


This page is viewed 504 times PhysOrg

One of Europe's best preserved medieval fishing structures located on the Fergus Estuary in County Clare, Ireland, will be washed away by tidal flows before archaeologists can reveal its secrets.

700-year-old fish weir in the Fergus Estuary, County Clare, Ireland, which the UCD archaeologists have been examining. (All images copyright UCD School of Archaeology)

A team of University College Dublin archaeologists who have been visiting the remote 700 year old fishing site will no longer be able to conduct their scientific recording and analysis, due to recent budget cuts experienced by the Irish Heritage Council. "There is little we can do to preserve the medieval fishing structures because they are totally exposed to the forces of nature on the mudflats, after being buried for centuries beneath the mud," explains Dr Aidan O'Sullivan, UCD School of Archaeology, University College Dublin.

"They are likely to be entirely destroyed within the next ten years."

"We had hoped that by working with the local community we could record this significant archaeological site before it is destroyed."

Located about 1.5km from the nearest dryland in the Fergus Estuary in County Clare, Ireland, the medieval fishweirs [wooden structures] are in the very middle of a vast landscape of mudbanks and water channels.

The archaeological site can only be accessed by boat for a few short weeks in the summer when the tide is extremely low.

"The mudflats are too deep and dangerous to walk on," says Dr O'Sullivan. "Even when we can see them at low tide, we only have about 2 to 3 hours at most to examine them," he explains.

"There are serious logistical and practical difficulties involved in gathering the data and taking samples."

The wooden fishweirs are long wooden fences of upright posts interwoven with wattle that converge in a V-shape on the estuary mudflats close to the low water mark.

"We can see wooden ropes with knots tying together the structure and most remarkably, we have even found woven, conical baskets intact in the clays at the ends of the weirs. It is almost as if someone had walked off and left these baskets there last year," says Dr O'Sullivan.

In the Middle-Ages, any fish dropping down with the ebbing tide would have encountered these fences and would have been guided into the end of the weir, where they would have been trapped by baskets and nets.

"Medieval fishermen would have travelled out here by boat at low tide to build and repair the weirs and to remove the catch every day," says Dr O'Sullivan.

"It is not known who built and used the fishweirs, but it seems likely that they were owned and managed by the Augustinian Abbey on Canon Island."

"Fish was a hugely important part of the diet of medieval clerics, given the number of saints' days in the yearly calendar. And the fish would also likely have been supplied for the dining tables of local lords."

Provided by University College Dublin



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Astronomers identify thick disc of older stars in nearby Andromeda galaxy

An international team of astronomers has identified for the first time a thick stellar disc in the Andromeda galaxy, the nearest large spiral galaxy to our own Milky Way.

Andromeda_galaxy_credit_Robert_Gendler_-prvThe discovery of the thick disc, a major result from a five-year investigation, will help astronomers better understand the processes involved in the formation and evolution of large spiral galaxies like ours, according to the team, which includes UCLA research astronomer Michael Rich and colleagues from Europe and Australia.

Using the Keck Telescope in Hawaii, the astronomers analyzed the velocities of individual bright stars within the Andromeda galaxy and were able to observe a group of stars tracing a thick disc — distinct from those comprising the galaxy's already-known thin disc — and assessed how these stars differ from thin-disc stars in height, width and chemistry.

Approximately 70 percent of Andromeda's stars are contained in the galaxy's thin stellar disc. This disc structure contains the spiral arms traced by regions of active star formation, and it surrounds a central bulge of old stars at the core of the galaxy.

"From observations of our own Milky Way and other nearby spirals, we know that these galaxies typically possess two stellar discs, both a 'thin' and a 'thick' disc," said Michelle Collins, a doctoral student at the University of Cambridge's Institute of Astronomy, who led the study.

The thick disc consists of older stars whose orbits take them along a "thicker" path — one that extends both above and below the galaxy's thin disc.

"The classical thin stellar discs that we typically see in Hubble imaging result from the accretion of gas towards the end of a galaxy's formation, whereas thick discs are produced in a much earlier phase of the galaxy's life, making them ideal tracers of the processes involved in galactic evolution," Collins said.

The formation process of thick discs is not yet well understood. Previously, the best hope for understanding this structure was by studying the thick disc present in our own Milky Way. However, much of our galaxy's thick disc is obscured from view. The discovery of a similar thick disc in Andromeda presents a much clearer view of spiral structure.

Astronomers will be able to determine the properties of the disc across the galaxy and will search for signatures of the events related to its formation, the researchers said.

"Our initial study of this component already suggests that it is likely older than the thin disc, with a different chemical composition," said UCLA's Rich, who was the principal investigator at the Keck Observatory for the observations. "Future, more detailed observations should enable us to unravel the formation of the disc system in Andromeda, with the potential to apply this understanding to the formation of spiral galaxies throughout the universe."

"This result is one of the most exciting to emerge from the larger parent survey of the motions and chemistry of stars in the outskirts of Andromeda,'' said Scott Chapman of the Institute of Astronomy at Cambridge. "Finding this thick disc has afforded us a unique and spectacular view of the formation of the Andromeda system and will undoubtedly assist in our understanding of this complex process."

The study is currently available in the online version of Monthly Notices of the Royal Astronomical Society and will be published in a print edition of the journal later this year.

UCLA is California's largest university, with an enrollment of more than 38,000 undergraduate and graduate students. The UCLA College of Letters and Science and the university's 11 professional schools feature renowned faculty and offer 328 degree programs and majors. UCLA is a national and international leader in the breadth and quality of its academic, research, health care, cultural, continuing education and athletic programs. Six alumni and five faculty have been awarded the Nobel Prize.

Author: Stuart Wolpert | Source: UCLA [February 15, 2011]


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