Learn how scientists traced kissing back 21 million years using primate behavior, evolutionary modeling, and clues from ...

Kissing is something of a mystery, being "only documented in 46 percent of human cultures," noted psychologist Catherine ...

Rather than being a recent cultural development, kissing may have been practised by other early humans like Neanderthals and ...

Mesopotamians kissed — and scientists are finally telling. New research suggests humans kissed each other on the lips 1,000 years earlier than previously thought. Researchers at Oxford University and ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. It may not be the most romantic thing to say, but kissing ...