deepwithfuture:

“Koalas, doll-sized marsupials that climb trees with babies on their backs, have fingerprints that are almost identical to human ones. Not even careful analysis under a microscope can easily distinguish the loopy, whirling ridges on koalas’ fingers from our own.

The fact that primates and koalas separately evolved fingerprints reveals the feature’s anatomical purpose. The lifestyles of both koalas and primates require a lot of hand-grasping, both for eating and climbing. It seems that the multidirectional ridges on our fingers evolved to help us grasp.”

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