Edwin Colbert vs John Ostrom

Edwin H. Colbert (1905–2001) was an American paleontologist who spent most of his career at the American Museum of Natural History. In 1969 he discovered fossils of the dicynodont Lystrosaurus in Antarctica's Transantarctic Mountains, finding the same genus in rocks on other southern continents. The discovery provided key evidence that those landmasses were once joined in the supercontinent Gondwa...

John Ostrom (1928–2005) was an American paleontologist whose work fundamentally altered modern paleontology and evolutionary biology. In 1969, he described the predatory dinosaur "Deinonychus," sparking a major revision of how dinosaurs were perceived in terms of their activity levels and metabolism. His research revived the theory that modern birds evolved from small theropod dinosaurs, a concept...