Some species of ornithomimosaurs that lived in what is now Mississippi, the United States, some 85 million years ago were among the world’s largest at over 800 kg, according to new research. Aepyornithomimus tugrikinensis, a species of ornithomimosaur that lived in Mongolia between 84 and 72 million years ago. Image credit: Masato Hattori. “During the majority of the Late Cretaceous, the southern North American continent was divided into two landmasses...
