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I didn't read the article. But it inspired me to look up the name of that band-aid proof flap of skin between your thumb and forefinger.

https://www.reference.com/science/name-area-between-thumb-in...

Spoiler Alert: Thenar space.




I call it swimskin, because it is the evolved remains of amphibious fin like hands.


I thought it was a frenulum.




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