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.

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.

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.

The nature series "Life Story," a collaboration between BBC and The Open University, shows how animals try to overcome the challenges they face throughout their lives to eventually continue their bloodlines by having offspring. The show, narrated by Sir David Attenborough, aims to give viewers an idea of what it is like for animals who face difficult choices in nature. Episodes document the journey of animals surviving the hazards of being young through learning how to survive as an adult, climbing the social ladder, getting a mate and becoming a parent.

A follow-up to the 2001 award-winning show "The Blue Planet," this natural history series sees Sir David Attenborough return as narrator and host. A breathtaking exploration of the world's vast oceans, hourlong episodes capture animals and other living organisms in their natural habitat, presenting viewers with a fascinating insight into what life is like underwater. From tropical seas to the harsh conditions of the Arctic, the makers of "Blue Planet II" use modern filming equipment and techniques to shine a light on areas of the planet that humans have never seen before.

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.

David Attenborough investigates the evolution of nature's flight in this documentary series. Using 3D macroscopic and high-speed filming techniques, the show captures flying mammals, reptiles and insects, as well as birds from all over the world. Attenborough travels from Scotland to Borneo to find the extraordinary species gracing the skies. Created by the award-winning team behind "Natural History Museum Alive" and "Flying Monsters," this series utilizes the latest technology to delve deeper into the animal kingdom to present the natural world's engineering and aeronautics in action.

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.

David Attenborough journeys across the polar regions of our planet.

The naturalist, broadcaster and writer continues to be intrigued by certain animals, despite a lifelong career of wildlife filmmaking. In "David Attenborough's Natural Curiosities," he highlights some of nature's evolutionary anomalies and how curious critters baffle and fascinate scientists. Each episode features two animals, linked by a common theme, who adapt to their environments in unusual ways. Filmed throughout the U.K., stories of nature turning the ordinary into the extraordinary are showcased with Attenborough's storytelling and amazing images of the animals.

"Dynasties" is a documentary by Sir David Attenborough as he goes on a journey behind some of the most celebrated and endangered animals on the planet. Follow the stories of penguins, chimpanzees, lions, painted wolves, and tigers. Each of these animals is locked in a heroic struggle against the forces of nature and their rivals -- they face harsh environmental conditions, dangerous predators, and even the greatest threat: humans. They actively seek to fight for their survival and the survival of their families -- their dynasties.