• For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea. The extraordinary claims are not supported by extraordinary evidence.

  Source: Cosmos: A Personal Voyage (1990) 7 min 25 sec

  Carl Sagan
  American astronomer, cosmologist, astrophysicist and author 1934-1996
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Subjects in these quotes:

1. extraterrestrial
2. extraordinary
3. appealing
4. supported
5. evidence

Similar authors

• Carl Sagan
  American astronomer, cosmologist, astrophysicist and author 139
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For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea. The extraordinary claims are not supported by extraordinary evidence. by : Carl Sagan

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