Do dinosaurs laugh?

Laughter has only been observed in some mammals, i know of a study looking at rats and laughter, other mammals have been observed 'laughing' such as great apes. Dinosaurs would not have had the ability to produce laughter, nor do i think comprehend it.

Only humans can laugh. Nobody knows for sure the kinds of sounds dinosaurs make. You can be sure they did more than roar. Probably a lot of hissing.

Yes, they are laughing at us as we're carelessly using up the earth's resources and ruining our planet... because if we keep doing this we will die out too.

Humour aside, I don't think they could laugh. Firstly, reptiles and even most of the mammals don't laugh. Secondly, you need cheeks and facial muscles to laugh, and dinosaurs had neither. They just had jaws that opened and closed.

Their laughter will most likely have been different to ours, and we probably would not be able to tell when they were laughing. We do not know whether any animal laughs except humans.

That's a very good queston, everything has a way of expressing happiness, so I guess we can't rule laughing out.

I suppose looking at birds might help answer your question, as birds are feathered theropods.