An evolutionary supertree featuring 440 of the 600 known species of dinosaurs, shows how dinosaur evolution, which surged during their first 50 million years, virtually came to a stand still during the Cretaceous period.
It remained at that low level throughout the following Cretaceous period, a time of plenty in Earth’s terrestrial history in which flowering plants, lizards, snakes, birds and mammals all became much more numerous. Dinosaurs apparently did not take advantage of the abundant food supply that emerged during the Cretaceous Terrestrial Revolution
If you’re not moving forward (as a species), then you’re moving backwards?
