Think of how many religions attempt to validate themselves with prophecy. Think of how many people rely on these prophecies, however vague, however unfulfilled, to support or prop up their beliefs. Yet has there ever been a religion with the prophetic accuracy and reliability of science? … No other human institution comes close.
Carl Sagan, Demon-Haunted World, 1995
Extraordinary claims require extraordinary evidence.
Every newspaper in America, with very few exceptions, has a daily astrology column. Astrology is bunk. Astrology is fraud. How many of them even have a weekly science column? Why that disproportion?
Carl Sagan, in a 1989 interview with Ted Turner discussing scientific illiteracy and the need for education reform.
Carl Sagan, A Demon-Haunted World: Science as a Candle in the Dark, 1995