Forget water in your ears, too much swimming and you’ll emerge from the water sporting the fingertips of a wrinkled prune. Is that an unattractive side effect of showing off your cannonball or an awesome comic book-worthy evolutionary advantage? Answer: you’re a futuristic marvel! Studies have shown that the distinctive wrinkling improves your grip in water. Since the pruning also happens on our toes, evolutionary biologists suggest that it could have helped our ancestors get better footing in the rain or wet conditions. Feeling a little skeptical? Try picking up a wet marble with dry fingers and then again with wrinkled ones. Science!