A fossil of the 23-foot-long predator could help unlock secrets of an order of dinosaurs that remain poorly understood. By Asher Elbein In 2019, a team of researchers uncovered a 70-million-year-old ...
Tens of millions of years ago, an apex predator resembling a giant crocodile stalked the humid freshwater floodplains of southern Patagonia. Measuring up to 11.5 feet (3.5 meters) long and weighing ...