This volume, aimed at the general reader, presents life and times of the amazing animals that inhabited Earth more than 500 million years ago. The Cambrian Period was a critical time in Earth's history. During this immense span of time nearly every modern group of animals appeared. Although life had been around for more than 2 million millennia, Cambrian rocks preserve the record of the first appearance of complex animals with eyes, protective skeletons, antennae, and complex ecologies. Grazing, predation, and multi-tiered ecosystems with animals living in, on, or above the sea floor became common. The cascade of interaction led to an ever-increasing diversification of animal body types. By the end of the period, the ancestors of sponges, corals, jellyfish, worms, mollusks, brachiopods, arthropods, echinoderms, and vertebrates were all in place. The evidence of this Cambrian "explosion" is preserved in rocks all over the world, including North America, where the seemingly strange animals of the period are preserved in exquisite detail in deposits such as the Burgess Shale in British Columbia. Cambrian Ocean World tells the story of what is, for us, the most important period in our planet's long history.

Now that a whale is too big for her tank, she is going to be returned to the sea. In all the great vastness of the ocean, will she be able to find a friend? "A fascinating tour de force."--"Kirkus Reviews." Full color.

The marine world is an immense, three-dimensional living space inhabited by marine life that varies from the mundane to the bizarre. Its salty influence extends up river estuaries, over seashores and inland with brine-laden spray. The Marine World covers all those organisms that live in, on and around the ocean bringing together in a single text everything from the miniscule to the immense. With chapters on marine bacteria, plants, fungi and protozoa, as well as all the major groups of marine invertebrates, plus fish, reptiles, mammals and birds, it provides an insight into the existence and way of life of almost everything living in the ocean. Each animal or plant is found in its own particular place and The Marine World encompasses principal ocean habitats and ecosystems including open water, seashores, deep sea, coral reefs and many more. Written with clear, accessible text and illustrated throughout with photographs and detailed drawings, The Marine World provides in depth information to provide answers for each group on 'what?' 'where?' and 'how?', via sections on identification, distribution, structure, biology, classification and conservation.

This title will introduce readers to ocean ecosystems, the plants and animals that thrive there, its climate, its food web, any threats to it, and conservation efforts. Readers will also learn about the most well known oceans and their unique characteristics. . Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.

Virtually an encyclopedia of the undersea world, this magnificent and comprehensive volume covers all aspects of life in the oceans. It is illustrated throughout with over 385 photographs, plus maps and diagrams.

Nobel Prize winner Al Gore wrote of Deborah Cramer's previous book Great Waters, "I urge everyone to read this book, to act on its message, and to pass on its teachings." Now Cramer offers a groundbreaking book for an even more urgent time. Our lives depend on the sea. As gifted science writer Deborah Cramer makes clear in this extraordinary volume, the ocean has been earth's lifeline for more than three and a half billion years. Life began in the scalding inferno of deep-sea hot springs. The first cell, the first plant, and the first animal were all born in the sea. Climate changes wrought by the sea created evolutionary pathways for mammals and gave rise to our human ancestors some 200,000 years ago. The one, interconnected sea still sustains us. Invisible plants in the ocean's sunlit surface give us air to breathe. Rushing currents supply water to the atmosphere's protective greenhouse and rain to dry land. But as Cramer reveals in this sweeping look at earth's biography, the vital partnership between earth and the life it nourishes has recently been disrupted. Today, a single terrestrial species, man, has begun to alter the health of the sea itself. The mark of humans on the seas is now everywhere—from the fertile waters of continental shelves to the icy reaches of the poles, from the dazzling diversity of coral reefs to the porous edge of estuaries. Even the open ocean bears clear traces of our harmful ways. Scientists believe human impact may have already sparked a catastrophic event that could change the sea and the earth irrevocably: the sixth mass planetary extinction on a scale unseen since the demise of the dinosaurs 65 million years ago. But unlike the forces that caused previous extinctions, humankind can make a choice. We can choose the mark we wish to make and the legacy we leave behind. Written in the passionate tradition of Rachel Carson, Smithsonian Ocean is at once a book for our time and for the ages. Carson wrote: "One way to open your eyes is to ask yourself: What if I had never seen this before? What if I knew I would never see it again?" Cramer's powerful and inspiring message is equally a wake-up call: "We hold earth's life-giving waters—and our future—in our hands." Our lives depend on the sea.