Rather, they had to wait their turn and evolved in fits and starts before finally dominating their world.”ĭinosaurs originated about 230 million years ago and survived the Late Triassic mass extinction (228 million years ago), when some 35 per cent of all living families died out. – long before they became abundant or diversified into the many different species we know today.īrusatte added: “It just wasn’t a case of dinosaurs exploding onto the scene because of a special adaptation. Importantly, the new research also shows that dinosaurs evolved into all their classic lifestyles – big predators, long-necked herbivores, etc. It isn’t clear from the data that they would go on to dominate the world until at least 30 million years after they originated.” “However, our research shows that the rise of dinosaurs was a prolonged and complicated process. “The sheer size of dinosaurs like Tyrannosaurus makes us think there was something special about these animals that preordained them for success right from the beginning,” Brusatte said. Reporting in Biology Letters, Steve Brusatte, Professor Michael Benton, and colleagues at the University of Bristol show that dinosaurs did not proliferate immediately after they originated, but that their rise was a slow and complicated event, and driven by two mass extinctions. Dinosaurs survived two mass extinctions and 50 million years before taking over the world and dominating ecosystems, according to new research published this week.
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