A new study is linking brain behavior to silly playtime practices. And they have lab rats laughing out loud to prove it.In the video above, you can hear tiny high-pitched giggles from a rat being ...

Rats have what appears to be a “laugh centre” in their midbrain that is activated when the animals are tickled or when they engage in play behaviours. Researchers first discovered that rats ...

It's similar to how people may smile silently, while talking, or while laughing—each of which conveys a separate emotion. Rats have also gotten the tickle treatment. Jaak Panskepp, a ...

You are hearing teeny tiny high pitched giggles from *** rat being tickled in the name of science. Researchers in Germany made rats their experimental play pals using plenty of tiny tummy tickling ...