May 24, 2022

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The oldest Homo sapiens fossil is at least 33,000 years old!

Dating of the oldest undeniable fossilHomo sapiens Estimated 200,000 years ago. Radiometric dating of a volcanic layer in Ethiopia makes it possible to re-evaluate the age of our species several thousand years ago.

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How old is the race Homo sapiens ? L ‘Origin Happened during races in Africa Pleistocene Late and Omo Kipish formations in southwestern Ethiopia contain remnants of Omo I, which date back to 200,000 years ago. In Study published in the journal Natural, A team of researchers is now reassessing the age of Omo I.

230,000 years ago

The formation of Omo Kibish is located in the valley The East African divide, Which is an area where strong volcanic activity is known and still known. However, the authors explain each one Volcanic eruption There is a kindDigital printing, Which makes its identity recognizable and unique. The remnants of Omo I lie beneath a dense layer of volcanic ash, the date of which was uncertain because the ash was so fine. Complete dating Will be carried out.

However, the authors of the study used pumice stones from the same ash to carry out radiometric dating. They were able to determine that the ash layer above the remains of Omo I was formed 230,000 years ago by the eruption of the Shala volcano 400 km away. The authors also mention that Fossils Aging is sometimes the cause Early stages of heredity H. Sabians But that Omo I creates the oldest undeniable fossil to dateHomo sapiens Tall, due to anatomical features such as globular cranium and chin.

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Homo sapiens is 35,000 years old

From Ancient researchers Australians and Americans have reviewed the period of human fossils found on the banks of the Omo River in southern Ethiopia.

French science article published on February 28, 2005

Both Skulls, The baptized Omo I and II, were discovered in 1967 and dated by approximate estimates of about 130,000 years by ratio analysis. Thorium And d ‘Uranium Oysters are found Sediment (A controversial date, because modern man was thought to be no more than 100,000 years old).

But the new methods available led Francis Brown of the University of Utah, John Flickel of Stony Brook University (New York), and Ian McDougall of the Australian National University to another conclusion: the two fossils, despite their differences, are contemporary. , Approximately 195,000 years (within 5,000 years).

The researchers particularly focused on the decay rateArgon Feldspar crystals are crystals slightly below the fossils and ash taken from well above (about 50 m); The former represents a lower limit of 196,000 years and the latter 104,000 years.

The Speed From Sediment Because the Omo River was so important at the time, the age of the remains is close to 196,000 years. Until then, it was considered the oldest human fossils found in Herto, Ethiopia, estimated to be 154,000 to 160,000 years old. This confirms recent paleogenetic analyzes of the origin of the workHomo sapiens -150,000 and -200,000 years ago.

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