Today I Learned...

A screenshot of a social media post by Hank Green explaining that wrinkly fingers are a neurological effect, not caused by water, and that people with severed nerves don't get wrinkly fingers. The post is a reply to a user asking about dogs' toes wrinkling in water and whether humans who spend a lot of time in water are less likely to wrinkle. The post is displayed on a dark background with white text, and the user's profile picture is visible in the top left corner.

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