As darkness falls over the Amazon rain forest, a large black caiman waits in a slow moving, muddy river. Only the reptile's eyes and nostrils are visible above the water. The caiman is watching a young deer that has come to the river to drink. As the deer dips its head toward the water, the caiman attacks. In just a few seconds, the large predator has dragged the deer under the water. Filled with information perfectly suited to the abilities and interests...