Why Were There No Tiny Non-Avian Dinosaurs? Mammals May Have Been to Blame

Dinosaurs evolved into some of the largest animals ever to walk the Earth, but a new mathematical model suggests that early mammals may have crowded them out of the ecological niches reserved for the smallest creatures. The post Why Were There No Tiny Non-Avian Dinosaurs? Mammals May Have Been to Blame appeared first on Sci.News: Breaking Science News.