In a grey-walled room in the Dutch city of Nijmegen, a strange activity is underfoot. Wearing a cap covered in sensors and positioning themselves into a chair, a person places their bare feet over two ...

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 ...

The mere mention of the word “tickle” can elicit a variety of reactions. For one person, tickling can represent play, while it can be the source of a sexual response for another, and for some, it has ...