How do we know that ants count their footsteps? We'll find out in this Naked Scientists Question and Answer show, as well as ask if rubber soles really protect you from electric shocks, if hair will clean itself when you don't, and why a layer of shaving foam stops the mirror from steaming up. Also, the spores that fly on smoke rings, new ways to capture carbon, pain free vaccine patches and the vaginal gel that could block HIV transmission. Plus, Meera investigates vintage computers and in Kitchen Science, Dave discovers how popping candy gets it's pop! Like this podcast? Please help us by supporting the Naked Scientists