Some hundred million years ago, crocodiles were the ruling T. rexes of the waters. They galloped on land, ambushed prey at the river's edge ... even terrorized dinosaurs. And more, these swift predators' cousins evolved through the ages into the modern crocs we know today. Now, armed with newly discovered prehistoric crocodile bones, Explorer-in-Residence Dr. Paul Sereno is determined to bring the ancient creatures to life - and tell their fantastic untold story. Learn about a croc that pursued prey across land, a supercroc that locked its jaws around dinos, and even one with a startlingly canine face. Blending art, forensics and biology, Sereno's team recreates a lost world of strange Cretaceous crocs that paleontology forgot.