Kissing probably began 20 million years ago with the ancestors of apes and Neanderthals

Kissing turns out to be a practice much older – and much more interspecies – than most people realize. By tracing this intimate behavior back through the primate family tree, researchers have uncovered evidence that great apes, early human relatives and even Neanderthals likely engaged in kissing millions of years ago. Evolutionary Mystery of Kissing Behavior Kissing occurs in a variety of animals, […]