After the extinction of non-avian dinosaurs at the end of the Cretaceous period, many mammals underwent a rapid increase in size. Several hypotheses for...
The long-necked dinosaurs, sauropods, are famous for their extreme body sizes, evolving body masses several times greater than the next-heaviest terrestrial...
The newly-identified species of beaver, Microtheriomys articulaquaticus, represents the oldest semi-aquatic rodent in North America and the oldest amphibious...
