A NASA video presentation: Our World: How Sand Protects the Shuttle! In this NASA eClips video segment, learn how NASA uses sand to protect the space shuttle. The shuttle must have a protective covering that can withstand extreme temperature changes when it enters and exits Earth's atmosphere again and again. In this video segment find out how the shuttle tiles are made from sand and how the sand is used as a protective layer to keep the astronauts and the shuttle safe.
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