Gigantic "terror crocodiles" that were as large as buses once roamed the Earth. This terrifying picture comes a study that was published this week the "Journal Vertebrate Paleontology". The study is universities in the USA. Researchers who are experts paleontology - the study dinosaurs - studied ancient bones found North America. They said that the dinosaurs lived the Pacific and Atlantic coasts of what is now Canada and the USA. The giant beasts preyed other dinosaurs and were up to ten metres in length. The researchers discovered that the prehistoric crocodiles had razor-sharp teeth that were the size large bananas.
Co-author the study Dr Adam Cossette gave details of how he thought the crocodiles lived. He said they lived 75 and 82 million years ago and are the ancestors today's crocodiles and alligators. He wrote about his research the bone parts he studied. He said: "Until now, the complete animal was unknown. These new specimens we've examined reveal a bizarre, monstrous predator teeth the size of bananas." He added that it was, "a giant that must have terrorised other dinosaurs that came to the water's edge to drink." Another co-author the study described how scary the beast was. She wrote: "It was so enormous, almost everything its habitat was the menu."