In 1787, someone in New Jersey—exactly who now seems to be forgotten—found an enormous thigh bone sticking out of a stream bank at a place called Woodbury Creek. The bone clearly didn’t belong to any species of creature still alive, certainly not in New Jersey. From what little is known now, it is thought to have belonged to a hadrosaur, a large duckbilled dinosaur. At the time, dinosaurs were unknown. The bone was sent to Dr Caspar Wistar, the nation’s leading anatomist, who described it at a meeting of the American Philosophical Society in Philadelphia that autumn. Unfortunately, Wistar
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