People/Carl Sagan/Quote

Carl Sagan1934–1996

Carl Sagan

Extraordinary claims require extraordinary proof.

Carl Sagan

Broca’s Brain (1979), Chapter 5, “Night Walkers and Mystery Mongers: Sense and Nonsense at the End of Science” (p. 73)

Share

More from Carl Sagan

All 27 quotes from Carl Sagan

Popular quotes