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Why do fingers become pruney? - Mark Changizi

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TEDEd Animation

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Why do fingers become pruney when they get wet? Likely, for the same reasons that tires have treads. Mark Changizi examines the evolutionary reasons for pruney fingers, while exploring natural and manmade phenomena, like river networks, that operate similarly.

Which is true about river networks on promontories?

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Meet The Creators

  • Director Lippy
  • Educator Mark Changizi
  • Narrator Mark Changizi

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