Behind the scenes of David Attenborough's landmark series in which he visited the Great Barrier Reef. See how Sir David utilized the latest technology to explore the reef.

Sir David Attenborough explores what is being done by researchers and scientists to save the Great Barrier Reef.

David discovers the incredible animals that visit the reef every year.

Sir David Attenborough descends at night in the state-of-the-art Triton submersible, the first of its kind, to visit the reef; he meets some of the tiny coral animals that built the reef and helped to turn it into an underwater wonderland.

One of the natural wonders of the world and the largest living structure on our planet.

From the frozen tundra in the north to the dry forests of the equator, Sir David Attenborough narrates a compelling view of the planet. "Planet Earth" was the first natural history documentary to be filmed in high definition, and now a decade later improved technology has made it possible to capture further details, from elusive animal behaviors to previously inaccessible remote landscapes. In addition to exploring the wilderness, the series examines urban dwellings, focusing on animals that have adapted to city life.

Sir David Attenborough narrates this critically acclaimed series that dives deep into the marine environment of Planet Earth. Although two-thirds of the world's surface is covered with water, scientists know less about the oceans than they do about the surface of the moon. This limited series travels from various coasts to the poles to examine watery denizens ranging from the gigantic blue whale to microscopic coral polyps.

Produced by the team that created BBC's "Planet Earth" series, "The Hunt" explores the relationship between predators and their prey. Sir David Attenborough narrates this documentary while the cameras follow the animals in their natural habitats. With a specific focus on strategy, the hunters are examined in detail -- from their use of the environment to their sharp instincts and physical prowess. On the other side of the fence are the hunted, which use their senses and defense tactics to flee when they feel threatened. Each episode centers on a different habitat, and the last one focuses on the state of the planet.

The planet is teeming with myriad life forms, both plant and animal, all interlocked in a struggle for survival. As time goes on, some living things are forced to adapt and change to survive. This series chronicles some of the most unusual, if not downright bizarre, behaviors that living organisms have devised to keep their species alive. The 11-episode series was four years in the making, taking camera crews to every continent and habitat.