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Message: <blockquote data-quote="Pbartender" data-source="post: 5133462" data-attributes="member: 7533">He may be thinking of the apatosaurus/brontosaurus mix up.In 1877 Othniel Marsh found a dinosaur skeleton that he named Apatosaurus ajax.  Two years later, he found another similar, more complete specimen that he thought represented another genus of sauropod, which he named Brontosaurus excelsus.  Later, Elmer Riggs did a more thorough comparison, and pointed out that the two specimens really belonged in the same genus.  Brontosaurus excelsus became Apatosaurus excelsus, and while brontosaurus became a popular synonym it ceased to exist as an actual dinosaur.Of course, this is a perfect example of the Scientific Method in action, rather than proof against it.</blockquote>