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Why Do We Get Pruney Fingers?

To tell you when to get out of the bath, according to my mom. But that's not good enough for science!

Kyriacos Kareklas and Tom Smulders of Newcastle University in England noted that the wrinkling of skin is actually controlled by the nervous system. Cut the nerve and the skin of your fingertips actually won't wrinkle. So, there must be a function to the wrinkle, right?

So the two decided to do the experiment and discovered that wrinkled fingers help improve the handling of wet objects:

Hit Play or go to Link [YouTube] | The report over at Biology Letters - via Science, Space and Robots

new idea: maybe the wrinkling is a side effect from the constriction of the blood vessels, what only happens to restrict heat loss. (how often would one get wrinkly fingers in nice warm water in survival conditions?)

Al tough the rain-tire-finger-trick sound fancier :)
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Holy crude, this goes hand in hand with the aquatic apes theory. For those that don't know TED Talks, there was a speaker named Elaine Morgan who theorizes that homo sapiens didn't evolve from grasslands apes, rather aquatic apes living by the seas. Very convincing theory AND it would go hand in hand with this wrinkle research!
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