David M. Raup - The Nemesis Affair (1986)

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A new theory is guilty until proven innocent, and the pre-existing theory is innocent until proven guilty...Continental drift was guilty until proven innocent.

David M. Raup

Perhaps the only thing that saves science from invalid conventional wisdom that becomes effectively permanent is the presence of mavericks in every generation - people who keep challenging convention and thinking up new ideas for the sheer hell of it or from an innate contrariness.

David M. Raup