Newly recognized T. rex ancestor is
Greater than 85 million years in the past, a smaller-bodied ancestor of the Tyrannosaurus rex roamed the plains of Mongolia. The dinosaur’s identification was unknown — till now. In a research revealed Wednesday in Nature, scientists describe the identification of a brand new tyrannosauroid named Khankhuuluu mongoliensis. Apex predators, together with the T. rex, ultimately arose…