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Rats Laugh, but Not Like Humans | Scientific American
See What Happens When You Tickle a Rat | National Geographic
Tickled rats reveal brain structure that controls laughter
Rats Laugh if You Tickle Them, Study Says | TIME
Tickling Rats Reveals a Brain Region Linked to Laughter and Play
Eavesdrop on Ultrasonic Rat Giggles | Scientific American
Rats have a 'laugh centre' in their brains that responds to tickling
Watch these ticklish rats laugh and jump for joy - AAAS
Tickled Pink: Why Scientists Want to Make Rats Laugh - Greater …
Researchers tickle rats to identify part of the brain critical for ...
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