Crocodiles These are the world's largest reptiles, and corcodiles must surely rank among the most spectacular of nature's predators. They can strike without warning from point blank range, delivering sixteen tons of crushing force in the blink of an eye. But hidden behind the serrated jaws and steely gaze is another, more intriguing story. From the tiniest blood vessels to the mightiest monster, the Ultimate Guide follows the crocodile story down the microscope and back through time. Prepare to sit back and learn the secrets of one of nature's oldest and most successful designs. Sharks Grey and swift as an F-14, it hones on its prey with a lethal array of five separate long range sensors. Learn how far and how fast the shark evolved to become the ultimate predator in your master reference to the worlds greatest living creatures.