Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more . (CNN) — A massive, extinct reptile that once snacked on dinosaurs had a broad snout like an alligator’s, but it owed its success to a trait that modern alligators lack: tolerance for salt water. Deinosuchus was one of the largest crocodilians that ever lived, with a body nearly as long as a bus and teeth the size of bananas. From about 82 million to