Fingers prune underwater not because of them absorbing the water or washing away the oil, but because of an evolutionary trait caused by the brain to enhance the grip of your fingers underwater.
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A man called Dean Karnazes ran 350 miles in 80 hours with no sleep, ran a marathon in the South Pole in -25 °C temperatures without snowshoes, and ran 50 marathons in 50 states in 50 days.
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