“Since, in the long run, every planetary society will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring — not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive.”

— Carl Sagan , book Pale Blue Dot

Source: Pale Blue Dot: A Vision of the Human Future in Space (1994), p. 371

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Carl Sagan 365

American astrophysicist, cosmologist, author and science ed… 1934–1996

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“Since, in the long run, every planetary society will be endangered by impacts from space, every surviving civilization is obliged to become spacefaring — not because of exploratory or romantic zeal, but for the most practical reason imaginable: staying alive.”

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Carl Sagan 365

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