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‘The clip below shows how, if you vibrate a surface violently enough, between around 30 to 200 times a second, and use a liquid that is a little thicker than water, droplets can be made to climb uphill.’
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via bookofjoe; it is what it says it is.
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interesting question & possible answer: ‘The hypothesis goes back to a 1967 paper … “Why are mountain passes higher in the tropics?” They aren’t, of course, but he suggested a pass at the same elevation may be more of a barrier in the tropics’
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