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New Clues Add 40,000 Years to Age of Human Species

s thousands of kilometers north in the Mediterranean that other researchers had already associated with specific, episodic climate changes.

In addition, the sediments show that each major layer deposited very rapidly, perhaps within a few thousand years or less. In the case of the Omo hominids, the researchers linked the isotopic ages to a brief period during which sediments entombed both sets of bones.

Together, the various lines of evidence seem to constrain the dates of the fossil human remains found at the Omo River to an age near 195,000 years ago, say the researchers, an age that agrees with estimates from genetic studies for the age of the last, common Homo sapiens ancestor, and reinforcing evidence that most of human history transpired in Africa.

The study was funded by the National Science Foundation, the L. S. B. Leakey Foundation, the National Geographic Society and the Australian National University.

Related Websites
Frank Brown homepage
John Fleagle homepage
Geochronology and Isotope Geochemistry at the Aust


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Source:National Science Foundation


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