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Rats Laugh When You Tickle Them 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! --- It's Never too Late to Study: --- Notice: This video is copyright by its respectful owners. The website address on the video does not mean anything. ---
Length: 01:31


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