The paleontologist and the three dinosaurs

Skulls thought to be from three different dinosaurs may actually be from the same dino type at three different ages

By Stephen Ornes, 00:00 AM November 25, 2009

Three different dinosaurs — <em>Dracorex</em>, <em>Stygimoloch</em> and <em>Pachycephalosaurus</em> (clockwise from top left) — might actually be the juvenile, teen and adult of the same dino.

Three different dinosaurs — Dracorex, Stygimoloch and Pachycephalosaurus (clockwise from top left) — might actually be the juvenile, teen and adult of the same dino.

Holly Woodward

A new twist in an old story about dinosaur bones sounds like a fairy tale for fossil fans: Once upon a time, scientists discovered three different dinosaur skulls in the northern United States. The first skull, found in 1931, was large and round. The second, found in 1983, was smaller and narrower—and had spikes sti...

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