Non-avian theropod dinosaurs like Tyrannosaurus rex relied less on speed, more on energy-saving, according to a new study published in the journal PLoS ONE. Daspletosaurus chasing Spinops. Image credit: Julius Csotonyi. Theropod dinosaurs were the dominant terrestrial carnivores during much of the Mesozoic era. These dinosaurs ranged in mass from 200 g to 9,000 kg and occupied much of the available niche space. While no single adaptation is likely...
