![]() ![]() in 1960 with a thesis on North American hadrosaurs that was based on the skull collection housed at the AMNH. ![]() Ostrom enrolled at Columbia University as a graduate student under his advisor Ned Colbert, and earned his Ph.D. ![]() His reaction to the eventual discovery of feathered dinosaurs in China, after years of acrimonious debate, was bittersweet. The first of Ostrom's broad-based reviews of the osteology and phylogeny of the primitive bird Archaeopteryx appeared in 1976. Since dinosaurs themselves are considered reptiles, Ostrom's work made zoologists question whether birds should be considered an order of Reptilia instead of their own class, Aves. John Harold Ostrom (Febru– July 16, 2005) was an American paleontologist who revolutionized modern understanding of dinosaurs in the 1960s.Īs first proposed by Thomas Henry Huxley in the 1860s, Ostrom showed that dinosaurs were more like big non-flying birds than they were like lizards (or "saurians"), and even proved that birds themselves are a type of theropod saurischian dinosaur. ![]()
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