Carl Sagan

The Demon-Haunted World

Guide to scientific thinking and defense against superstition and pseudoscience

About the author

Carl Sagan
Carl Sagan

American astronomer and science communicator whose Cosmos television series and book brought the scale and wonder of the universe to a mass audience. Pale Blue Dot made the case for cosmic perspective as a moral argument. He was an eloquent advocate for the scientific method and skeptical thinking.

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