Giant "terror crocodiles" the size of a bus lived on Earth 75 million years ago. Researchers studied old bones found in America. They said the crocodiles lived along the east and west coasts of North America. Some of the giant crocodiles were ten metres long. They hunted and ate other dinosaurs.

The giant crocodiles changed to give us today's crocodiles. A researcher studied new bones. He said the bones showed there was a strange, giant hunter "with teeth the size of bananas". He said it scared "other dinosaurs that came to the water's edge to drink". Another researcher said it was so big it ate almost everything.