This fascinating series uses breathtaking footage and digital imaging to tell the story of the great forces that shape our planet -- volcanoes, the oceans, the atmosphere, and ice. Discover the secrets behind cataclysmic disasters, 11th-hour coincidences that staved off extinction, and the earth's astonishing power to continually regenerate. Traveling from Ethiopia's unique lava lake to an ice cave under a glacier in Greenland and a host of amazing locations in between, Earth examines the forces that have helped create and foster life. We discover that these forces have not always been benevolent: the ocean once belched poisonous gas into the atmosphere; encased in ice, the earth nearly froze to death; and a great meteorite strike helped to drive the dinosaurs to extinction. Yet, through each disaster the planet, aided by lucky breaks, has steered its own recovery and sustained life. Can it continue this astonishing fight for survival, or are humans contributing to a process of inevitable destruction? Originally airing on the BBC in 2007, the series came to the U.S. via the National Geographic Channel in 2008.