“Dr. Frock, is any artifact capable of doing this missing from the collection?” “There is no such artifact in the collection,” said Frock with a faint smile. “You see, this comes from no living animal I’ve studied. Do you see how this claw has a conical shape, a deep fully enclosed root? See how it tapers to an almost perfect tripyramidal cross section near the top? This appears in only two classes of animal: dinosaur and bird. That is one of the reasons some evolutionary biologists think birds evolved from dinosaurs. I would say it is from a bird, except that it is far too large. Thus,
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