Carl Sagan Quotes About Ufos

Quotes about: Ufos

• After I give lectures-on almost any subject-I am often asked, "Do you believe in UFOs?" I'm always struck by how the question is phrased, the suggestion that this is a matter of belief and not evidence. I'm almost never asked, "How good is the evidence that UFOs are alien spaceships?"

  Carl Sagan

  Believe, Giving, Suggestions

  Carl Sagan (2011). “The Demon-Haunted World: Science as a Candle in the Dark”, p.82, Ballantine Books

• UFOs: The reliable cases are uninteresting and in the interesting cases are unreliable.

  Carl Sagan

  Interesting, Cases, Ufo

• Is mankind alone in the universe? Or are there somewhere other intelligent beings looking up into their night sky from very different worlds and asking the same kind of question?

  Carl Sagan

  Intelligent, Night, Sky

• For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.

  Carl Sagan

  Stress, Years, Atheism

  Carl Sagan (2011). “Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium”, p.46, Ballantine Books

• We can make a similar examination, but with greater uncertainty, of the extraterrestrial hypothesis that holds that a wide range of UFOs viewed on the planet Earth are space vehicles from planets of other stars.

  Carl Sagan

  Stars, Space, Earth

  Carl Sagan (1973). “Carl Sagan's Cosmic Connection: An Extraterrestrial Perspective”, p.200, Cambridge University Press

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