Our ancient primate relatives—including Neanderthals—may have enjoyed a nice peck on the lips. But researchers still don’t ...

"A comparative approach to the evolution of kissing," was published by Evolution and Human Behavior on Nov. 19 ...

Kissing was a trait that originated in the ancestors of large apes 21.5 to 16.9 million years ago, long before Romeo and ...

A new study released on Wednesday found that humanity's first kiss occurred roughly 21 million years ago, predating humans.

Kissing is more than just “mouth-to-mouth” touching, and the study doesn’t really shed much light on why humans kiss the way they do, said Adriano Reis e Lameira, an evolutionary psychologist and ...

Kissing did not begin with star-crossed human lovers but with the primate ancestors of great apes around 20 million years ago ...