A nearly complete Stegosaurus skeleton sold for a record $44.6 million at auction Wednesday. Sotheby’s, which handled the sale, described the fossil as the best-preserved Stegosaurus specimen of its ...
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 ...