Read an excerpt from the new book, 'Born Human,' about Chuck Schuldiner, who played in the bands Death, Control Denied, Mantas, and Voodoocult.

Evolutionary biologists don’t know why we kiss — but new research suggests kissing evolved long before humans existed.

Kissing stretches back roughly 21 million years, to the shared ancestor of humans and other large apes, according to the ...

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