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.

If you think about it, kissing is really weird. You press your sensitive, nerve-filled facial muscles against another ...

Kissing may feel like a very human habit, but new research suggests it has much deeper roots. A team of scientists says the behavior likely began more than 20 million years ago, long before modern ...

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