WATCH: Why Do Curling Stones Curl?! https://www.scientificamerican.com/video/why-do-curling-stones-curl/ … via @sciam #WinterOlympics #PyongChang2018 Learn more about momentum and friction here: http://khan.co/PhysicsMomentum pic.twitter.com/qFtKBw9sxL
7:08 PM - 21 Feb 2018
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