Not slippery when wet – Can our pruney bath fingers help us make safer tyres? Car tyres have rain treads. Shoes have rain treads. So, why don’t animals have rain treads? Here evolutionary neurobiologist Mark Changizi – and author of the new book having nothing whatever to do with rain treads, Harnessed: How Language and Music Mimicked Nature and Transformed Ape to Man – describes his team's new research suggesting that we do have rain treads. They are our pruney fingers. Better than what’s on our shoes and tyres, they may allow us to build better treads in the future. Look out Pirelli, Goodyear and Firestone, pruney tyres are on the way!