Colin Barras
Colin Barras
Science writer based in Michigan.Source
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Americas' first people may have arrived thousands of years earlier than we thought

Americas' first people may have arrived thousands of years earlier than we thought

Archaeologists say stone artefacts point to occupation more than 30,000 years ago — but not everyone is convinced. Archaeologists excavating a cave in the mountains of central Mexico have unearthed evidence that people occupied the area more than 30,000 years ago — suggesting that humans arrived in North America at least 15,000 years earlier than thought. The discovery, which includes hundreds of ancient stone tools, is backed up by a fresh statistical analysis that incorporates data from other sites. But the conclusion has stirred controversy among some researchers. “When I see claim...

nature.com
Colin Barras
Jul 22
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Neanderthal DNA linked to higher fertility in modern humans

Neanderthal DNA linked to higher fertility in modern humans

×A chunk of Neanderthal DNA carried by some people living today appears to reduce the chance of miscarriage and promote fertility. The finding is the latest evidence that Homo sapiens benefitted from Stone Age sexual encounters with other human species.Genetic studies suggest on several occasions, and that people of non-African descent . For about 10 years . It might haveExisting subscribers, please with your email address to link your account access.Paid annually by Credit CardInclusive of applicable taxes (VAT)*Free gift is only available with quarterly and annual subscription purchases...

newscientist.com
Colin Barras
Jul 20
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All five of Earth's largest mass extinctions linked to global warming

All five of Earth's largest mass extinctions linked to global warming

×The second-most severe mass extinction in Earth’s history may have been triggered by global warming. The discovery means that, for the first time, all of the largest known extinctions can be linked to a rapid rise in the planet’s temperature.“It completes the jigsaw puzzle in many ways,” says Andrew Kerr at Cardiff University, UK. Geologists recognise five points in time when huge numbers of species were wiped out, although recent research suggestsExisting subscribers, please with your email address to link your account access.Paid annually by Credit CardInclusive of applicable taxes...

newscientist.com
Colin Barras
May 23
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