Covering nearly three-quarters of our planet, the world's oceans are a vast and unique ecosystem from which all life on Earth originated. But each year the marine realm is more susceptible to harm by careless exploitation, and as demands for food, waste disposal, transport, and travel increase, the fate of the world's oceans hangs in the balance. This timely guide explores this expansive-and fragile-frontier. Oceans collects more than thirty thematically arranged articles from the past decade, including recent pieces written in the wake of the 2004 tsunami, and features articles that investigate the origins of the world's oceans, the diversity of life in the water, the state of global fisheries, the dangers of natural disasters, and the perils oceans face, whether induced by nature or by humans. With a breadth of topics as wide as the ocean is deep, this Scientific American anthology will be indispensible for readers interested in the evolution, ecology, and conservation of the oceanic ecosystem. Scientific American, the premier general-interest science magazine, reports the most important developments in modern science, medicine, and technology to more than three million readers worldwide. The oldest continuously published magazine in the United States, it has been at the forefront of science for more than 150 years. Evolution: A Scientific American Reader, is also published by the University of Chicago Press. Book jacket.