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

A new study that examines how kissing evolved suggests that ape ancestors and early humans like Neanderthals probably locked lips with their friends and sexual partners. The behavior may date back 21 ...

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

Or, as her majesty Faith Hill might say, “This kiss.” And, it turns out, it’s also really old. British scientists say they’ve ...

THURSDAY, Nov. 20, 2025 (HealthDay News) — Kissing may feel like a very human habit, but new research suggests it has much ...

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

Our results paint early apes in an amorous light, showing that the ancestors of large apes were kissing each other as far back as 21.5 – 16.9 million years ago. Clearly, they were onto a good thing ...

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.

Scientists have traced kissing back to early primates, suggesting it began long before humans evolved. Their analysis points ...

We used this definition to trawl published scientific papers, searching for observations of kissing in the group of monkeys ...