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Animals

When Tickled, Rats Giggle at a Supersonic Level

The finding suggests that tickling may be the holy grail of happiness shared by most mammals.

November 10, 2016
2:02 PM EST
Image: The somatosensory cortex highlighted in an illustration of the brain, showing where neurons tied to ticklishness and laughter are located. Credit: Shimpei Ishiyama and Michael Brecht