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The slipperiness of ice explained

Winter sports such as skiing, speed skating, figure skating, and curling require the slippery surfaces of ice and snow. While the fact that the ice surface is slippery is widely acknowledged, it is far from being completely ...

dateMay 09, 2018 in Condensed Matter
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Image: The colors in Saturn's rings

Saturn's rings display their subtle colors in this view captured on Aug. 22, 2009, by NASA's Cassini spacecraft. The particles that make up the rings range in size from smaller than a grain of sand to as large as mountains, ...

dateApr 25, 2018 in Space Exploration
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