Smithsonian Magazine on MSN

How Did Humans End Up Smooching on the Lips? It May Have Started Out With a 21-Million-Year-Old Kiss

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

Ever wonder why we kiss? The art of smooching could predate humans

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