If you've ever spent time with a dog, you've probably wondered if they're actually smiling or even laughing when they seem to be in a good mood. Scientists still don't understand everything about laughter in humans, so it makes sense that there's still a lot we don't know about dogs and the way they express emotions. According to Konrad Lorenz and Patricia Simonet, two scientists who study laughter, there's heavy evidence that dogs can in fact laugh, not only through vocalization but also through other movements such as wagging their tails.
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