Colour of Belly Button Fluff Brainiac: Science Abuse : Season 4 Episode 2

Jon Tickle explores the colour of belly button fluff, what is the squirtiest food, the gunpowder is back to race humans, what happens when you depth charge an aquarium, Debbie McGee takes on the electric chair, who’s better - left handers or right handers, what’s the best word for a smiley photo and we kiss goodbye to another caravan.