Science: Open for Repairs

The General Theory of Relativity is supported by an impressive body of astronomical observation. Relativity explains the orbital eccentricities of Mercury, the "stretching" of light from heavy stars, the bending of starlight around the sun, the slowed motion of solar atoms, the expanding universe. Albert Einstein, however, has refrained from putting up any "No Trespassing" signs around his mathematical edifice. He has done some mending himself, particularly on the shape of the cosmos, and he is glad to have other mathematicians drop in for a little tinkering. Modern relativity theory in fact owes...

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