Sharks and dinosaurs, dinosaurs and sharks, we find them both alien and awe-inspiring, at once utterly inhuman and somehow irresistibly compelling. But forget Jaws and Jurassic Park—nothing can prepare you for Sea Monsters: Prehistoric Creatures of the Deep, an amazing plunge into the Cretaceous oceans of 80 million years ago, a merciless realm ruled by the most ferocious animals ever to stal…