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'Biological time capsules': How DNA from cave dirt is revealing clues about early humans and Neanderthals

The oldest sediment DNA discovered so far comes from Greenland and is 2 million years old.
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Unraveling the Hidden Legacy of Neanderthals: How Machine Learning and Ancient DNA Are Redefining Human Evolution

“Modern humans were essentially like waves crashing on a beach, slowly but steadily eroding the beach away.” With this vivid simile, Princeton geneticist Joshua Akey describes a process that, until ...