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4 million year old fossil boosts South Africa's claim of being home of humanity
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New dating of South Africa\'s most famous hominid fossil confirms it is older than widely thought, boosting the country\'s claim to be a home of humankind, scientists said today.
New dating of South Africa's most famous hominid fossil confirms it is older than widely thought, boosting the country's claim to be a home of humankind, scientists said today.
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Handout photo shows dorsal view of Fuxianhuia protensa. Named "Little Foot," the skeletal remains are those of a small ape-like creature who fell into a pit in South Africa's Sterkfontein cave complex millions of years ago. How many years, though, is the question, and teams have put forward an extraordinary range of estimates, from 1.5 to four million.
The date is the key issue as to whether humans rose in East Africa, as a mainstream theory suggests, or in southern Africa -- or possibly in both or other places simultaneously.
The new dating of Little Foot, reported in the journal Nature, puts the remains at 3.67 million years old, give or take 160,000 years. That makes it a rough contemporary of "Lucy," the Ethiopian hominid that has the most prominent claim on being our earliest-known ancestor.
"There is nothing to rule out the idea that (Little Foot) was the forerunner of humanity. Everything is possible," said Laurent Bruxelles from France's National Institute for Archaeological Research (Inrap), who took part in the study. In the claim for being the cradle of humanity, "southern Africa is back in the race," Bruxelles said.
The evidence comes thanks to an updated form of the technology used to date the sediments in which the fossil was found. The technique, called cosmogenic nuclide dating, looks at levels of rare isotopes that are created when soil or rocks are hit by high-speed particles that arrive from outer space.
A first attempt using this method, in 2003, suggested an age of four million years, although it had an enormous margin of error.
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