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[QUOTE]Originally posted by Myra Wysinger: [QB] [IMG]http://wysinger.homestead.com/herto_man.jpg[/IMG] Three fossil skulls from Ethiopia, recovered at the village of Herto, have been revealed as the oldest human remains yet discovered. The 160,000-year-old finds plug an important gap in the fossil record around the time our species first appeared, providing confirmation that Homo sapiens originated only in Africa. They have been given their own subspecies - Homo sapiens idaltu. "The problem with the African record is that it has been really sketchy," states Tim White, University of California, Berkeley, who led the team that made the discoveries. “There are good human fossils from 100,000 years ago but from then back to 300,000 years ago the remains are either highly fragmented, poorly dated or both.” In contrast, the newly revealed skulls have precise dates thanks to the fragments of volcanic rocks found with the fossils. When rocks cool, they begin to accumulate argon gas from the decay of a potassium isotope. Analysing the gas gives the rock's age, in this case 154,000 to 160,000 years old. The recovery of the fossils began in 1997, when White stumbled across a fossilised hippopotamus skull. His team eventually recovered skull fragments from 10 humans, along with many stone tools and animal fossils. The child's skull was in over 200 pieces strewn over hundreds of metres and it took two years of painstaking work to reconstruct it. The child's skull is also marked and broken edges have been polished. This suggests to White that the skull was carried around after death and buffed up in the process - possibly as part of an ancestor worshipping ritual. This is the earliest evidence that bones were kept by descendants and points to an advanced level of cultural development. James Randerson 11 June 2003 NewScientist.com [IMG]http://wysinger.homestead.com/san5.jpg[/IMG] [IMG]http://wysinger.homestead.com/san4jpg.jpg[/IMG] [/QB][/QUOTE]
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