“Suppose your father… walked into this room at the ordinary human pace of walking. And suppose just behind him was his father. How long would we have to wait before the ancestor who enters the now-open door is a creature who normally walked on all fours? The answer is a week.”

The Varieties of Scientific Experience: A Personal View of the Search for God (2006)

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Carl Sagan365

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

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