alternatehistory.com

There were some small theropods IOTL which we know now were very bird-like and which had fossils discovered in the 19th Century though they were not fully identified then. Well, suppose a paleontologist gets lucky enough to discover say, a furcula in a dinosaur sometime in the 1880s, in time to avert the emergence of the "dinosaurs are huge, lumbering, slow beasts" idea? How does paleontology in general and dinosaur paleontology in particular change if the "birds are dinosaurs" idea is established 50 years earlier and popular culture depicts dinosaurs all along as rapid, fast-moving creatures?
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