The oldest Homo sapiens

The oldest Homo sapiens - co-author of the study and dean...

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The oldest Homo sapiens Fossils push human emergence back to 195,000 years ago Geologist Frank Brown, dean of mines and Earth sciences at the University of Utah, crouches on Ethiopia's Kibish rock formation, where Brown and colleagues determined that fossilized bones of Homo sapiens were 195,000 years old -- the oldest fossils of the our species ever found. Credit: Ian McDougall, Australian National University Full size image available here When the bones of two early humans were found in 1967 near Kibish, Ethiopia, they were thought to be 130,000 years old. A few years ago, researchers found 154,000- to 160,000-year- old human bones at Herto, Ethiopia. Now, a new study of the 1967 fossil site indicates the earliest known members of our species, Homo sapiens, roamed Africa about 195,000 years ago. "It pushes back the beginning of anatomically modern humans," says geologist Frank Brown, a
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Unformatted text preview: co-author of the study and dean of the University of Utah's College of Mines and Earth Sciences. The journal Nature is publishing the study in its Thursday Feb. 17, 2005, issue. Brown conducted the research with geologist and geochronologist Ian McDougall of Australian National University in Canberra, and anthropologist John Fleagle of New York state's Stony Brook University. The researchers dated mineral crystals in volcanic ash layers above and below layers of river sediments that contain the early human bones. They conclude the fossils are much older than a 104,000-year-old volcanic layer and very close in age to a 196,000-year-old layer, says Brown. "These are the oldest well-dated fossils of modern humans ( Homo sapiens) currently known anywhere in the world," the scientists say in a summary of the study....
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The oldest Homo sapiens - co-author of the study and dean...

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