“Attend me. How do you prove that there are eggs in a bird’s nest? Don’t strain your gray matter: go climb the tree and find out. There is no other way.”

—  Robert A. Heinlein, book Time for the Stars

Source: Time for the Stars (1956), Chapter 8, “Relativity” (p. 82)

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Robert A. Heinlein photo
Robert A. Heinlein557
American science fiction author 1907–1988

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