Actually its been speculated that even had a meteor not wiped out a good deal of the species of dinosaurs, they were still not an environmentally resource-conscious species of animal and the larger ones ate more than the environment could survive. They ate themselves to starvation. That's why very small prehistoric animals survived (such as the Tuatara and and the Crocodile family). I.E. They would have died out anyway.
Pushes up non-existant dinosaur glasses.
Pushes up non-existant dinosaur glasses.