Rats Laugh When Tickled

And guess what? They like it!
By Evann Gastaldo,  Newser Staff
Posted Apr 2, 2010 12:02 PM CDT

A YouTube gem from 2007 is making the rounds again, teaching us something kind of neat and kind of gross: Rats laugh when tickled. When a Bowling Green University professor decided to try tickling the rodents, and then listening to their resulting high-frequency noises on a “bat detector,” he discovered that the rats not only laughed—they actually seemed to be enjoying the whole activity, New York reports.
(Read more rats stories.)

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