Dinosaur Discoveries in North America

Early Dinosaur History in the United States

Who first suggested that some dinosaurs were bipedal?

Originally, dinosaurs were thought of as either giant, sprawling lizards, or bulky, quadrupedal reptiles with some mammal-like features. But, in 1858, American paleontologist Joseph Leidy (1823–1891) described an almost complete skeleton discovered by W.P. Foulke in Haddonfield, New Jersey. The fossil skeleton, named a Hadrosaurus, was more complete than any yet discovered. It also indicated that the dinosaur was bipedal—a radical notion for its time.


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