New Twist for an Old Theory
Although the moon has lately been giving up many of its ancient secrets to prying spacecraft, it has clung stubbornly to onethe genesis of its own existence as an earth satellite. With monotonous regularity, scientists have punched holes in theories that the moon was torn, Eve-like, from the earth's side; that the earth and moon condensed simultaneously, as neighbors, from the same blob of primordial dust; or that the moon was a planetary interloper accidentally captured by the earth's gravity. Says Nobel Laureate Chemist Harold Urey:...
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