Dolphins Peaceful, intelligent, friendly beings that swimas if they owned the sea, dolphins have long evoked our affection and fascination, but we know little about them. Ultimate Guide takes a fresh look at the world of the dolphins and meets up with scientists who are deepening our understanding of them. With cutting edge computer animation, Ultimate Guide shows what happened fifty million years ago, when a wolf like mammal took to foraging in swamps and estuaries. Over eons, in short, these creatures evolved into the family of dolphins, porpoises and killer whales. Whales The largest creatures that ever lived and yet exquisitely graceful mammals, whales can dive a mile into the depths of the ocean. Learn about their past, discover their successes and failures, see startling comparisons of size and speed and cutting edge computer animation in your master reference to the worlds greatest living creatures.