"I approach my character with the question: What would an animal think? How would an animal respond? A lot of times, it's quick action and no fear, and sometimes it's irrational fear. You don't always know."

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There are about 250,000 different species of fossil plants and animals known . . In spite of this large quantity of information, it is but a tiny fraction of the diversity that [according to the theory] actually lived in the past. There are well over a million species living today and . . [it is] possible to predict how many species ought to be in our fossil record. That number is at least 100 times the number we have found.

— David M. Raup