Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Humans are born with instincts for crying and smiling, but not for ...
Smithsonian Magazine on MSN
How Did Humans End Up Smooching on the Lips? It May Have Started Out With a 21-Million-Year-Old Kiss
Our ancient primate relatives—including Neanderthals—may have enjoyed a nice peck on the lips. But researchers still don’t ...
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