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Early DNA reveals two distinct populations in Britain after the last ice age
by Patrick Hilsman
Washington DC (UPI) Oct 25, 2021

Scientists have sequenced the oldest human DNA discovered in Britain and discovered two unique population groups that lived in Britain after the last ice age.

A sample discovered in Gough's Cave in Somerset, England, from approximately 14,000 years ago, was compared to a sample from approximately 1,000 years later, which was discovered in Kendrick's Cave, Wales.

"We knew from our previous work, including the study of Cheddar Man, that western hunter-gatherers were in Britain by around 10,500 years ago, but we didn't know when they arrived in Britain, and whether this was the only population that was present," said Selina Brace, a principal researcher at the Natural History Museum in Britain, who studies ancient DNA.

By studying the remains found in Gough's Cave, researchers were able to determine that humans were present in Britain 300 years earlier than scientists had previously thought, meaning they were present before Britain began to warm after the last ice age.

Genetic studies of the two samples revealed that they came from two distinct genetic groups, meaning that at least two completely different populations of humans were living in Britain within a relatively short timeframe.

The artifacts discovered among the two populations suggest vastly different cultural practices.

"The evidence from the human remains found at Kendrick's Cave suggests that the cave was used as a burial site by its occupiers," said Silvia Bello, a researcher at the Natural History Museum who specializes in the evolution of human behavior.

In contrast, Bello said, "the evidence at Gough's Cave points to a sophisticate culture of butchering and carving human remains."

It was also revealed that these early inhabitants were using parts of animals believed to have already been extinct in Britain at the time including a spear tip made out of mammoth ivory and a baton made of reindeer antlers.

According to Chris Stringer, a research leader on human evolution at the Natural History Museum, "this raises several interesting questions: Did they bring these artifacts from somewhere colder? Or was Britain even more complicated and still had mammoth and reindeer surviving in the highlands?"


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Unlocking the mysteries of how neurons learn
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When he matriculated in 2019 as a graduate student, Raul Mojica Soto-Albors was no stranger to MIT. He'd spent time here on multiple occasions as an undergraduate at the University of Puerto Rico at Mayaguez, including eight months in 2018 as a displaced student after Hurricane Maria in 2017. Those experiences - including participating in the MIT Summer Research Bio Program (MSRP-Bio), which offers a funded summer research experience to underrepresented minorities and other underserved students - not on ... read more

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