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

New research suggests that kissing probably predates humanity and evolved between 16.9 million and 21.5 million years ago, after the ancestor of the great apes split from the lesser apes, or gibbons.

Romantic kissing likely evolved for the first time in a common ancestor of humans and other large apes about 21 million years ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. “The meeting of ...

The study, which was published on Wednesday in the Journal of the Human Behavior and Evolution Society, found that the very ...

Snogging. Smooching. Canoodling. While such kissing is often depicted as a universal behavior in sexual encounters and romantic relationships around the world, a growing body of anthropological and ...

In Western cultures, we mark the beginning of romantic entanglement by touching lips. Few actions are as fraught with anxiety and symbolism as that first kiss—and it’s no exaggeration to say that some ...

Humans pucker up for all kinds of reasons. We kiss for love, for luck, to say hello and goodbye. There’s also the whole ‘it feels so good’ thing. And when you stop and really think about the act of ...

Romantic kissing refers to the touching of lips between romantic partners — boyfriends, girlfriends, spouses, etc. Romantic kissing is rarely studied in sciences — aside from the very unromantic ...