'Oldest remains' outside Africa reset human migration clock 150000 years earlier

11 Juillet, 2019, 06:38 | Auteur: Therese Cote

And it adds more weight to the theory that modern humans migrated out of Africa multiple times, before Homo sapiens became the last human species standing.

When the researchers removed the skulls from their surrounding rock using a chisel and hammer, tiny bone fragments became dislodged as well. They named them Apidima 1 and 2, after the cave in which they were found, which overhangs the Aegean Sea and is accessible only by boat.

The researchers speculate that there could have been contact, or perhaps even conflict, between the Neanderthals and the Apidima people. The other, more complete skull belonged to a Neanderthal who lived 170,000 years ago.

However, a recent study from a multinational team led by Katerina Harvati reconstructed the specimens digitally and dated them by measuring their radioactive decay. Apidima 2 lived about 170,000 years ago, while Apidima 1 was dated to be 210,000 years old. Their presence is documented by finely-worked stone tools and other finds.

An global team - including Manchester University experts - created virtual reconstructions of each using state-of-the-art technology.

A team of researchers from Greece, Germany, Australia and the United Kingdom has used modern dating and imaging techniques to figure out how they belonged to and how long they've been sitting there.

The latter showed Neanderthal-like features such as a thick, rounded brow ridge whereas the former displayed modern ones.

But Mirjana Roksandic, a paleoanthropologist from the University of Winnipeg, said the skull will help scientists in their continuing quest to fit together the puzzle pieces of human evolution.

Map shows locations of key early fossils of Homo sapiens, or modern humans, and related species in Africa and Eurasia.

Havarti thinks this part of Eurasia might have served as a refuge for animals and human populations during that period, since the mild coastal climate was a preferable alternative to other parts of Europe.

Stranger Things breaks Netflix viewing records
Created by Matt and Ross Duffer, the the third season of Stranger Things takes place during the summer of 1985 in Hawkins. The friends at the center of Stranger Things are going through the usual growing pains as the new season begins.

Man arrested after allegedly scaling Buckingham Palace front gates
The man was able to gain access to the grounds of Buckingham Palace where he allegedly tried to "bang down the doors". A source told The Sun that the Queen was sleeping in her bedroom at the time of the intrusion.

Carlson: Rep. Omar 'Living Proof' Immigration System 'Dangerous'
In Omar's version, America wasn't the bighearted country that saved her from a brutal war and a bleak refugee camp. He also suggested to viewers that "maybe we are importing people from places who are simply antithetical to ours".

Scientists do not know yet why the populations resulting from the early out-of-Africa dispersals, such as those to Israel or Greece, did not survive.

Eric Delson, an anthropologist with Lehman College who was unaffiliated with the study, said in an accompanying Nature article that these groups "reached the Middle East and southeastern Europe, but did not persist in these regions".

Study author Professor Katerina Harvati, of Tubingen University in Germany, said: "Our results indicate it is an early modern human - about 210,000 years old".

The incomplete nature of the Apidima 1 skull may leave some experts uncertain about its true origin, wrote Eric Delson, a paleoanthropologist from City University of NY, in a commentary that accompanied the study. It is estimated to be between 100,000 and 250,000 years old.

"All humans alive today outside Africa can trace their ancestry" to that final, successful dispersal, Harvati said, but early migrants like Apidima 1 didn't contribute any genetic material to humans living today. Then the species that eventually gave rise to Neanderthals moved into Europe between 600,000 and 800,000 years ago.

That makes it by far the oldest modern human remains ever discovered on the continent, and older than any known Homo sapiens specimen outside of Africa.

They dispersed out of Africa and across the world, sweeping all before them from about 70,000 years ago, leading to the demise of Neanderthals in Europe around 40,000 years ago. Over time, these ancestors replaced Neanderthal populations in those areas.

Southeast Europe is considered to be one of those major migration corridors out of Africa. But those early migrants don't appear to have been successful.

The human skull, found in Apidima Cave on the southwestern coast of the Peloponnese was originally identified as Neanderthal and disappeared into the general table of fossils from humans and their closest extinct hominins relatives.

Conseillé:



Populaire

Greek police suspect murder in death of U.S. scientist
Molecular biologist Suzanne Eaton, 59, was visiting the Greek island of Crete for a conference when she vanished on July 2. The body of American scientist Suzanne Eaton was found in this cave on the Greek island of Crete July 8, 2019.

James Tedesco fires NSW to thrilling win in Origin decider
The last time they went longer without a win outside their home state was an 11-game stretch from 1999 to 2006 (D1, L10). Queensland legend Paul Vautin said: "Some of the penalties have been bewildering".

Bentley EXP 100 GT Concept Previews Electric Future for the Brand
The five non-driving modes mean passengers can sit back and bask in the upscale interior while keeping their hands off the wheel. The rounded, bevelled headlights ditch the traditional Bentley two-roundel setup for something more streamlined.

Georgia Mother Orders Moana-Themed Cake, Gets Marijuana Instead
The cake had "marijuana" written on it with green coloured icing. The mother has not yet spoken to the bakery about the fiasco.

Johnson criticised as United Kingdom ambassador resigns in Trump emails leak row
Mrs May told Parliament she spoke to Sir Kim on Wednesday morning and said she did not want him to resign. This has brought home to me the depth of friendship and close ties between our two countries.

Bond yields creep higher as markets wait for Fed signals
Japan's Nikkei had also finished lower and Chinese blue chips barely budged as data showed inflation remained subdued. Brent crude futures rose 67 cents to $64.83, while United States crude gained 83 cents to $58.66 a barrel.

Last Volkswagen Beetle drives into the sunset
The last of the 5,961 Final Edition models will be put on display in a museum following a ceremony in Puebla on July 10, 2019. As a side note, Wolfsburg was founded in 1938 by the Nazi regime to house the German automaker's workforce.

Federer, Nadal set-up Wimbledon blockbuster, Djokovic faces Bautista Agut
As for facing Djokovic , he said: "I played some really, really tough and hard matches against Novak". Djokovic won the first game of the first set before Goffin climbed back for a 4-3 lead in the set.

Williamson credits seamer attack as Black Caps stun India
Jadeja and MS Dhoni put on 116 runs for the seventh wicket to fix the damage, but their wickets spelt the end for the pre-tournament favourites.

Trump Reacts After Obama-Appointed Judge Blocks Administration’s Latest Census Move
Constitution specifically assigns the job of overseeing the census to Congress, limiting the authority of the president over it. District Judge Jesse Furman wrote that the Justice Department's request to change the legal team was "patently deficient".