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 tickled in the name of science.Researchers in Germany made the rats ...

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 ...

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.

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 tickled in the name of science. Advertisement ...

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 tickled in the name of science.Researchers in Germany made the rats ...

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 tickled in the name of science.Researchers in Germany made the rats ...

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 tickled in the name of science.Researchers in Germany made the rats ...