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Good Thinking, Einstein

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Gravity Probe B

Artist's image of the Gravity Probe B spacecraft.

Katherine Stephenson, Stanford University and Lockheed Martin Corporation

The longest experiment in space physics began with three men in a university swimming pool arguing about Einstein. It ended Wednesday, after 52 years and $750 million, with scientists affirming his theory of relativity after studying the most perfect spheres ever made as they orbit around the Earth.

From The Wall Street Journal
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