我们为什么有指纹?

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Why do we have fingerprints¹?

我们为什么有指纹？

Many experts think it's to improve grip, but a British study from a few years back suggests otherwise.

 

Researchers found that a fingerprint's ridges² actually madeit harder to hold flat, smooth surfaces, like Plexiglas, because they reduced the skin’s contact area.

 

Instead, they think our prints might help wick water off our fingertips or allow our skin to stretch more easily, which can protect it from damage and help prevent blisters³.

 

Other scientists have suggested fingerprints could improve our sense of touch.

 

What we do know for sure is that no two people's fingerprints are the same, even among identical twins.

 

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