Scientists listened to animals playing and they noticed something that appeared to them to be laughter. They studied this behavior for couple of years before acturally realizing that it is laughter.
Soon they got a device which transformed higher frequency sounds to frequencies our auditory system can hear.
So they developed a way to ask these rats if they liked being tickled and the answer was definite yes!
The Pacers Outlasted The Bucks In An Instant Classic To Win Game 3
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[image: pacers]ESPN The Pacers outlasted a stellar performance by Khris
Middleton in overtime.
1 hour ago
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