Movement. That is the reason why. We grasp, grab, squeeze, hold, pinch, pull and do a lot of other things with our hands that require to move our hands. and your finger prints are so the skin can move closer or spread apart when we do something. Have you ever had a blister on you hand, and popped it? well, have you noticed how that skin feels when you pick something up. it feels weird. that is because the skin can't separate or "close" as good as the regular skin with you fingerprint. The new layer of skin is smooth, so the skin has to either rip, or bump up. But the ridges of the fingerprint allow for it to curl together or spread apart. Like when you have a shoe with those bumps, it is there so the shoe can flex better than a shoe without. That is it. And the reason for everyone's fingerprint to be different, is because you try to put together two artificial hands, made of millions and millions of tiny building blocks, and tell me when they are EXACTLY the same.
As always,
Scientifically,
-Connor
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