Neuroscientist Sophie Scott explores the neurobiology of laughter in this wonderful short film about perception, communication and cognitive development. We rarely think about it, but laughter — whether it's a quick smile or an uncontrollable giggle-fit — is tangled up with all of these things.

Take a few minutes to enjoy this — it's remarkable to ruminate on just how much emotional, psychological, biological and social information is stored and transmitted in something as natural and, at times, uncontrollable as laughter. [Spotted on It's Okay to be Smart]