Other cat owners have tried the trend out on their pets. Womineer told her adorable tabby, Ollie, an especially cheesy joke. ...

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 ...

Human laughter may trace its evolutionary beginnings to vocalizations made during play. This type of "laughing" is found in many mammals and even in some birds. If You're Still Running Windows 10, You ...