The Atlantic Ocean stretches 10,000 miles, including a 90 kilometer stretch of a warm current called the Gulf Stream. The Gulf Stream propels the migration of many different animal species, creating unique feeding frenzies for the predatory whales of the Atlantic Ocean. Jellyfish, sea turtles, fish, plankton, and people are also affected by the Gulf Stream that warms Northern Europe and keeps the Arctic Ocean from freezing. Learn about the symbiotic...

In the final leg of his journey, Simon Reeve investigates the resources boom that is enriching Australia and explores where the Indian Ocean meets the South China Sea - a crucial hub of world trade.

Continuing his tour, Simon Reeve visits a Sri Lankan elephant project, meets the Tamil people, travels on a prawn trawler, and ends on the ship-breaking beaches of Chittagong, Bangladesh.

The third leg of Simon Reeve's journey is the most dangerous as he travels from the beautiful coast of Kenya to Somalia, where pirates are plaguing ships offshore, and to the war-torn capital.

Oceans cover over 70% of the Earth's surface and are the heart and lungs of our planet. They help regulate climate, feed us, and support much of the planet's biodiversity. We are placing tremendous pressure on our ocean habitats - but with most of them out of sight, how do we know when we've pushed these environments too far? This video clip features a massive new research project in western Australia that is aiming to find out.

When it comes to regulating global temperatures, forget the Amazon Rainforest. It's the oceans that really deserve the title of lungs of the planet. Their plankton provides us with oxygen. Their currents transport heat from the tropical regions to the poles, acting as an air conditioner. They absorb almost a quarter of the carbon dioxide emitted annually. But so much of what they do and exactly how they do it is still unknown. To gain a deeper understanding...

Underwater volcanic forces created the longest mountain range on Earth, the Mid-Atlantic Ridge, 60 million years ago. In this film, explore the undersea ridges and islands, and the animals that live among them- the crabs of Ascension Island and spinner dolphins of Fernando de Noronha. The strong circumpolar current brings life and sustenance to the creatures of the depths and the skies of the Atlantic Ocean.

The Sumatra-Andaman earthquake of 2004 is estimated to have released the energy of 23,000 atomic bombs, inundating coastal communities with tsunami waves up to 100 feet high. This program explains the undersea geologic forces that create tsunamis - and considers the possible consequences if a landslide-generated mega-tsunami were to strike the East Coast.

A young Pi Patel, overcoming a cataclysmic shipwreck, finds himself stranded on a lifeboat with the last survivor, a ferocious Bengal tiger named Richard Parker.

Canal systems, ballast water from oceangoing ships, and seemingly little things such as fish stocking, bait bucket emptying, and trailering recreational boats all provide ways for non-native invasive species to infest North America's aquatic environments. Using the Great Lakes-unwilling home to the sea lamprey, zebra mussel, round goby, and Eurasian ruffe-as a case study, this program takes a close look at the threats posed by aquatic nuisance species...