10 Things Your Body Does That Science Can't Explain

Without these guys, you could get away with murder, but no one is quite sure why humans have fingerprints.

Most of the creases on your body are caused by repeated bending, stretching and wrinkling, but the unique patterns on your fingers and toes are just there. The prints form whilst we are still in the womb and, despite the popular belief, not even identical twins have matching prints.

There are a couple of schools of thoughts on our unique finger wrinkles. Some scientists think that they could be a way of improving grip in wet conditions, and it is thought that this is also the reason behind why you go all pruney when you spend all evening in the bath.

Another theory is that it increases the sensitivity of our fingertips. We are able to detect lumps and bumps that are just 13 nanometres in size, so if this is that case then it's highly effective.

It is thought that the common elliptical "loop" shape of the design is to ensure that some ridges are always being dragged sideways over a surface, allowing them to sense its texture.

Either way, we're still pretty baffled as to what they're really for.