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Life is not a miracle. It is a natural phenomenon, and can be expected to appear whenever there is a planet whose conditions duplicate those of the earth.
[My study of the universe] leaves little doubt that life has occurred on other planets. I doubt if the human race is the most intelligent form of life.
Above all, I regret that scientific experiments-some of them mine-should have produced such a terrible weapon as the hydrogen bomb. Regret, with all my soul, but not guilt.