Why do our fingers wrinkle in the bath?

The skin on our fingertips and toes shrivels like prunes when soaked for a few minutes in water. But is this an adaptation that occurred to help us in our evolutionary past?

Video by Andy Brownstone

Presented by Howard Timberlake

Additional Images & Footage: Getty Images, BBC News

Based on an article from BBC Future's Ask A Stupid Question column by Richard Gray.