A Kugel ball is a sculpture consisting of a large granite ball supported by a very thin film of water. Water flows beneath a very heavy, perfectly spherical rock from a spherical concave base with the exact same curvature. A Kugel ball can weigh thousands of pounds, but because the thin film of water lubricates it, the ball spins. The term Kugel ball originates from the German word kugel, which can mean ball, sphere or globe.
The Daily Omnivore 
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