Not since Newton had anyone devised a more precise explanation of gravity—the universal "glue" that pervades everything, from minuscule atoms to massive stars. Yet for all the significance to modern physics of Einstein's 1915 general theory of relativity, his complex equations have still not been proved beyond a shadow of a scientific doubt.
Last week, in an announcement that excited physicists round the world, University of Massachusetts Astronomer Joseph H. Taylor added new weight to the Einsteinian case. At a gathering of astrophysicists in Munich, Taylor reported indirect experimental evidence affirming...
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