The best models of lunar origin are the testable ones, but the testable models for lunar origin are wrong.

S. Ross Taylor, paraphrased by geophysicist Sean Solomon, at Kona, Hawaii, Conference on Lunar Origin, 1984; cited in: Hartmann, Wm. K., The History of Earth, p. 44, Workman Publishing Co., Inc., Broadway, NY, 1991.

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