Barbara J. Feldman

Named from two Greek words meaning “terrible lizard,” dinosaurs first appeared about 220 million years ago, and then disappeared rather suddenly 63 million years ago. Dinosaurs capture our imagination in many different ways. Their tremendous size, their fearsome looks, and the mystery of their extinction are but a few of the dinosaur wonders worth pondering. [Editor's Note: An updated version of this topic can be found here: Dinosaurs]