If you think laughter and comedy are reserved strictly for humans, you’d be wrong. A study in the late 1990s showed that creatures like rats emit ultrasonic vocalizations while playing with or ...
Rats can’t vomit. This may be a function of their anatomy—their stomachs are “not well structured for moving contents towards the esophagus” is how one study delicately put it—or it may have something ...
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