DNA extracted from ancient sediments gives clues about early humans

Researchers have found clues about early humans from DNA preserved in resin-soaked sediments. The scientists extracted DNA from 13 archaeological sites around the world to identify the species that lived there. At Denisova Cave in southern Siberia, for example, sediment DNA revealed the evolutionary comings and goings of Neanderthals and a mysterious group dubbed the Denisovans.

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