They became known as the Lost Dinosaurs of Egypt — until paleontologists found more spinosaurus fossils in Morocco in 2014." Some scientists believe they were a swimming dinosaur.

5 fast facts about dinosaurs The heaviest known dinosaur is thought to be Argentinosaurus, a supermassive titanosaur that lived during the Cretaceous period.

An illustrated record book of theropod facts and figures--from the biggest to the fastest to the smartest. This compendium features more than 3,000 records, covers some 750 theropod species, and ...

26 Dinosaur Facts That Are So Absolutely Bonkers I'm Questioning My Entire Education Right Now Courtesy Everett Collection A dinosaur stands outside an overgrown entrance marked ...