Watch as these adorable felines create chaos, pull off epic fails, and react in the funniest ways possible. Whether they’re slipping, jumping, or simply giving their humans attitude, every ...

Before we can even speak, we laugh and we cry. It’s hardwired in us from birth ... So you’d have to find something particularly hilarious, and react to it for a very long time, if you wanted ...

“If we laugh in [any way] other than that way, it sounds very odd,” says Provine. Watch Laughing and Crying on The Nature of Things to learn more.