“The entire evolutionary record on our planet, particularly the record contained in fossil endocasts, illustrates a progressive tendency toward intelligence. There is nothing mysterious about this: smart organisms by and large survive better and leave more offspring than stupid ones.”

—  Carl Sagan

Source: The Dragons of Eden (1977), Chapter 9, “Knowledge is Our Destiny: Terrestrial and Extraterrestrial Intelligence” (p. 240)

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

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