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miknave
Lv 4
miknave asked in Education & ReferenceQuotations · 1 decade ago

Did Carl Sagan actually say " extraordinary claims require extraordinary proofs"?

When and where would be helpful.

2 Answers

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  • Polly
    Lv 4
    1 decade ago
    Favorite Answer

    The phrase is actually

    "Extraordinary claims require extraordinary EVIDENCE".

    It can be found on page 339 of his book, "Cosmos", written in 1980.

    Source(s): http://en.wikiquote.org/wiki/Carl_Sagan
  • Martha P
    Lv 7
    1 decade ago

    Yes, in his book Cosmos (1980).

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