Video: Rats get excited, ‘giggle’ when tickled, scientists reveal

Tummy-tickling causes rats to break out in giggles and jump with joy – but only when they are happy, a study has shown.

Scientists confirmed the ticklishness of rats in experiments that involved researchers laying the animals on a platform and tickling them mercilessly with a gloved hand.

The rats responded by approaching the tickler, jumping joyfully, and emitting ultrasonic squeaks beyond the range of human hearing that bore a striking resemblance to laughter.

By monitoring activity in the rat’s brains, the scientists confirmed that the animals were behaving in much the same way people do when tickled.

The research was published in the journal Science.



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