Why are these crocodiles spending so much time on dry land? Is it because their watery homes are too polluted? Or is it because they’re scared of a bigger predator lurking in the water? An ancient dinosaur that we thought was long gone, but it never left? Meet the Spinosaurus. It’s more massive than the T.rex, likes to swim, and loves to eat anything that enters its territory. If humans had been living alongside these river monsters all along, how different would our lives have been?