Don’t try this at home, but tickling a gorilla, orangutan, bonobo or chimp can inspire bursts of grunting sounds. Yes, that’s laughter, says Marina Davila Ross of the University of Portsmouth in ...

Like human infants, young apes are known to hoot and holler when you tickle them. But is it fair to say that those playful calls are really laughter? The answer to that question is yes, according to ...

Tickling is a very strange sensation because it doesn't depend on your will. That's right, you don't decide whether or not to laugh; your body simply reacts. Your brain doesn't even have a chance to ...

If you tickle a young chimp, gorilla or orang-utan, it will hoot, holler and pant in a way that would strongly remind you of human laughter. The sounds are very different. Chimp laughter, for example, ...