If you think laughter and comedy are reserved strictly for humans, you’d be wrong. A study in the late 1990s showed that creatures like rats emit ultrasonic vocalizations while playing with or ...

At parties and bars, he introduces himself as a “rat tickler.” The title makes Shimpei Ishiyama sound like he belongs in some forgotten guild of yore, with the Victorian “pure-finders,” who collected ...

I have just discovered a profoundly human, evolutionarily crucial fact about the new baby in our house: He likes to be tickled. This isn’t a joke. For centuries, the deepest of thinkers — Aristotle, ...

Rats love to be tickled and they not only “giggle” but they jump for joy, too, researchers reported Thursday. Subscribe to read this story ad-free Get unlimited access to ad-free articles and ...

At parties and bars, he introduces himself as a “rat tickler.” The title makes Shimpei Ishiyama sound like he belongs in some forgotten guild of yore, with the Victorian “pure-finders,” who collected ...