"# Certainly we have seen spectacular changes in the concept of private property and of national borders as we have moved into the space age..."
— Walter Orr Roberts

January 1, 1970

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Added on April 10, 2026
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Harvard University alumniPhysicists from the United StatesMembers of the American Philosophical SocietyAstronomers from the United States
Original Language: English

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https://en.wikiquote.org/wiki/Walter_Orr_Roberts

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