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Once again, Lennart Nilsson's cameras take us into the mysterious and beautiful world of the human body, capturing incredible never-before-seen footage.

Provides an introduction into human and plant cells and looks at the primary functions and structure of the cell. Examines how the body repairs damaged cells.

Part 1: Origins: Search for and discover the origin of today's animal life. Part 2: Life On the Move: When we think of animals, we think of movement. Surprisingly, the diverse and graceful ballet of movement may have started with a single group of creatures whose descendents were the first to harness the power of muscles and nerves.

Part 1: The First Hunter - The first animal to develop a head, eyes and a brain also pioneered a new way to survive: it would become Earth's first hunter. Dramatic new evidence points to an unlikely and oddly charismatic subject...the flatworm.

Part 1: The Conquerors: For hundreds of millions of years, animal life resided only in the oceans. And then, in one extraordinary event, something happened that enabled one group of animals to emerge from the sea. Follow scientists as they track how the shape of life transformed to create the animals that led the first successful land invasion and were the first to pioneer flight.

The Shape of Life tells the gripping and magnificent tale of the beginnings of all animal life.

Little on this earth can withstand the violent fury of an F5 tornado. A churning vortex with winds over 300 miles an hour, these tornadoes create immense swaths of death and destruction in a matter of seconds. But today, experts are exploring the supertwister's complex inner working in bold new ways in the hopes of one day being able to accurately predict the occurrences of tornadoes.

In 2009, filmmaker Josh Fox learned his home in the Delaware River Basin was on top of the Marcellus Shale, a rock formation containing natural gas that stretches across New York, Pennsylvania and huge stretches of the Northeast.

Is access to clean drinking water a basic human right, or a commodity that should be bought and sold like any other article of commerce? Stephanie Soechtig's debut feature is an unflinching examination of the big business of bottled water.

A huge bottled-water industry has recently emerged, with the U.S. its largest consumer. But is bottled water actually healthier, safer, or tastier than tap water? A water expert explains that bottled water does not meet the same strict standards in the U.S. as water from the tap, though tap-water quality can vary among communities.

Despite its wonders, Earth's water cycle does not spread water evenly around the planet. The Ogallala Aquifer’s huge underground reservoir of water gives the relatively dry Central Plains states such as Nebraska a large but limited irrigation source. But the aquifer's water is being used up faster than it is beng replenished.

From the stunning creators of Blue Planet: Seas of Life comes this epic 5-disc series celebrating the Earth as never before. With an unprecedented production budget, using high definition photography and revolutionary high-speed cameras.

Contains footage of the wreckage of two famous ships describing the skills and techniques used in underwater forensics.

Our appetite for the earth's resources and consumer goods has led to increased levels of carbon dioxide entering our atmosphere, trapping more heat from the sun and leading to global warming of the atmosphere.

Getting outdoors is one of the great pleasures in life. But our expeditions into natural environments can also cause real horror stories to unfold. Discarded rubbish causes the waterways to become clogged, a campfire can leave a nasty visual scar that can last for years. How can we avoid causing these problems? This program examines ways to minimise our impact when enjoying the outdoors.