Word: posthuman
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Dates: during 1950-1959
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...Since the life of man on earth occupies only the small span of 1,000,000 years out of the accepted time span of 5 billion years for the universe as a whole, it seems obvious to Dr. Calvin that on other planets life may have developed to a "posthuman" state, in which creatures on man's level have been succeeded by some higher organism. Dr. Calvin's conclusion: "Life is not a rather special and unique event on one of the minor planets around an ordinary sun at the edge of one of the minor galaxies...