Two new genetic analyses help explain the unexpected roles Neanderthals play in modern human life — influencing everything from hair color to mental health. The new research also adds to evidence that Neanderthals lived in small, isolated communities, while a third study suggests that early modern humans may have developed large social networks that facilitated the exchange of mates and ideas.
The findings help explain what exactly Neanderthal DNA is doing in many modern human genomes, and how it affects our health. Piecing together the sex lives of our human ancestors may also help us understand how and when these genes were exchanged. All together, the three studies — published in various journals last week — contribute key clues to...
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