Crocodilians is the scientific name for crocodiles, alligators, gharials and caimans. Collectively they area walking, breathing link to the dinosaurs that roamed the Earth 240 million years ago. And they look even more fierce as long as a pickup truck, and with giant mouths full of razor-sharp teeth. Loathed for their eating habits and adored for their skins, alligators and crocodiles were hunted almost to extinction. But thanks to some...