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Robert Carpick, a curler and a friction scientist, explains what scientists now think causes ice to be slippery. It is believed that there is a nano-thin layer of water on top of the ice that allows skates to slide along ice. Aired Feb. 7, 2014 [9:53 min]
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- Knovation Readability Score: 3 (1 low difficulty, 5 high difficulty)