Chris Kaelin, a geneticist at Stanford Medicine, found himself thinking about cats. Not just any cats, but the loud, lovable, ...

Chimpanzees and humans last shared a common ancestor around 6 million years ago. Scientists suspect this ancient ancestor must have been a drummer — using beats to communicate. ''Our ability to ...

Have you ever wondered why your cat sometimes seems distant, then suddenly curls up on your lap, purring like a tiny engine?