There's nothing quite like that yelp of laughter you emit when being tickled. Now, experts have confirmed that shrieks induced by tickling really do sound recognisably different to other types of ...

If you tickle a rat's belly, it squeals with laughter. However, we are unable to perceive this laughter as its frequency, around 50 kHz, exceeds the range of human hearing. Neuroscientist Jaak ...

There are some sounds that stay with you, rattling around in your brain until they become part of your sonic memory. See enough movies, and certain sound effects will hold this honor—like the Wilhelm ...

One morning 10 years ago, psychologist Jaak Panksepp walked into his lab and made an unusual proposition to a research assistant: “Come tickle some rats with me!” Panksepp wasn’t just trying to ...