Predators in Peril

Fifteen years ago, a handful of African Penguins, normally found only on remote islands off the Southern African coast, stumbled across on of the Cape's most beautiful and popular tourist beaches. They swam, they saw, they conquered. And today, Boulders beach is home to more than 4,000 of these delightful, resourceful and entertaining seabirds who live side by side with their human neighbours -well, most of the time! These knee-high invaders not only share the beach, they dodge traffic, scale fences, and take over gardens, the golf course and even the occasional bedroom! For the two feathered stars, Henry and Margot, it's a tale of romance, the challenges of parenthood, separation and a penguin's worst nightmare, oil.

A group of scientists are thinking outside the box for ways to reverse the effects of global warming. And who better to save the earth than National Geographic Channel's host of the World's Toughest Fixes, Sean Riley? He'll join these experts in the labs and in the field to see what wacky new technologies are being developed, like sending mirrors into space and reducing the greenhouse emissions chickens produce.

In 2009 a team of British cavers went on an expedition deep within the jungle of central Vietnam. To their amazement they discovered an enormous cave which they believe to be the biggest in the world. The team, the first humans ever to enter the cave, traveled 6 kilometers underground until their way was blocked by a gigantic rock face they dubbed 'The Great Wall of Vietnam'. Now they have returned, but this time with the right equipment to climb the wall and with a geologist and zoologist to discover if this is indeed the Biggest Cave in the World and what secrets lie deep within?

It is one of the most controversial issues of our day, jeopardizing the health and smearing the reputations of Olympians, professional sports players and even high school athletes. The government has declared them illegal without a prescription, athletes call them unfair, and some doctors say they are potentially deadly. What are the real dangers of these drugs? We've seen what's happening outside the body; now NGC reveals what's happening inside the body, in the Science of Steroids.

Wild rabbits share the sea cliffs on the island of Skomer, off the Pembrokeshire coast, with seabirds like puffins and seagulls. They come in many shades, owing to their intriguing history, and each spring the island of Skomer itself is transformed by wild flowers, creating one of Britain's most beautiful natural spectacles. The green and brown island turns blue and pink for a couple of spectacular weeks under a carpet of bluebells and red campion.

A devoted pair of little owls set up home in an old orchard in rural Herefordshire. From spring blossom to autumn apples, a year in the life of the parent birds, their baby owls and the old fruit trees.

Two otters, a mother and daughter, are inseparable as the cub faces the dangers of her first Scottish winter, and Mum works hard to ensure both survive. Never more than a few feet apart, cub and mum exhibit a very special relationship as the cub grows up, learning how to fish and fend for herself on the idyllic west coast of Scotland.

An in depth look at the undersea life of dolphins