Researchers in Germany played hand-chasing games and tickled rats to record their brain activity to learn more about the link between play and the brain.
https://www.cnn.com/videos/health/20...cprog-orig.cnn
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"...inclined to play or laugh" ? I've known plenty of rats & while I know they play, I didn't realize they can laugh- I wonder if it's within human hearing range? Anyway, what fun research!
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