Laughologists have recently figured out that dogs laugh! Apparently it sounds like a a long pant and other dogs get a kick out of hearing it.
"What we found is that it had a calming or soothing effect on the dogs," said Patricia Simonet, an animal behaviorist in Spokane who has studied everything from hamster culture to elephant self-recognition. "Now, we actually really weren't expecting that."Hamster culture? Dear Ms. Simonet, where can I find out more about this hamster culture?