There is no greater test for life than winter, as temperatures plummet to 70 below and winds reach 200kph. Darkness and ice extend across the polar regions and only a few remarkable survivors gamble on remaining. We join a female polar bear trekking into the Arctic mountains to give birth as the first blizzards arrive. Out on the frozen ocean, the entire world's population of spectacled eider ducks brave the winter in a giant ice hole kept open by ferocious currents. Arctic forests transform into a wonderland of frost and snow - the scene of a desperate and bloody battle between wolf and bison, but also where a remarkable alliance between raven and wolverine is made. Beneath the snow lies a magical world of winter survivors. Here tiny voles dodge the clutches of the great grey owl, but cannot escape the ultimate under-show predator - the least weasel. Midwinter and a male polar bear wanders alone across the dark, empty icescape. Below the snow, polar bear cubs begin life in an icy den while fantastical auroras light the night skies above. In Antarctica, we join male emperor penguins in their darkest hour, battling to protect precious eggs from fierce polar storms. Weddell seals escape to a hidden world of jewel-coloured corals and alien-looking creatures but frozen devastation follows as sinister ice stalactites reach down with deadly effect.

It is the greatest technological challenge ever undertaken by humankind. The quest to produce the ultimate energy solution, Fusion, a reliable source of clean power. What if we could create here on earth, our very own version of a star, a machine that makes power from nuclear fuel? But so immense are the challenges, the goal of a power-producing fusion reactor has so far remained elusive and out of reach... until now.

600 miles off the coast of South America in the Pacific Ocean there are 120 tropical islands that erupted from the deep ocean floor more than 10 million years ago. Journey from the lava ramparts to its fiery heart, we'll discover how the Galapagos archipelago became one of the most important areas of biodiversity in the world.
Those swept here by storms and currents survived million to one odds to find untouched islands free from competition. These hardy pioneers evolved in remarkable ways in what's known as Nature's Greatest Experiment. Home to bizarre specialists and unexpected giants, the most precious collection of island creatures on Earth.

The extraordinary story of Earth and why it is special and uniquely brimming with life among a largely unknown but harsh cosmic arena. It will be told by eight astronauts from their unique perspective of being away from Earth. In the first episode, Astronaut Chris Hadfield reveals the unlikely and unexpectedly interconnected systems that allow life on our planet to breathe.

We all come from the same place, a moment when a dead rock came to life. Discover the story of how and why life began on Earth, and what makes our planet different from the others.

The series Warrior Graveyard uncovers some extraordinary warrior skeletons from history. Archaeologists and forensic scientists use remains to tell the story of famous warriors of the past and unleash the full force of modern forensics upon them: battle scars, bone deformations and recoverable scraps of DNA will all be tested and explored. CGI and drama will then bring them dramatically to life, revealing a revolutionary new picture of how these warriors lived - and died.
An archaeological and forensic examination of six crusaders' bones brings to life the 1179 Battle of Jacob's Ford, revealing the wounds that killed the warriors in the Holy Land. With every sword slash comes an insight into an historic day. Excavations along the Israel/ Jordan border are unearthing skeletons and rewriting the history of the First Crusade. The site at Jacob's Ford is the only known Crusader battle site with complete skeletons. To secure the road between Akkon and Damascus, King Baldwin IV of Jerusalem had a mighty castle built at the Jacob's Ford of the Jordan River in October 1178. The fortress was a thorn in the side of Sultan Saladin, so he had it stormed a year later, before it was completed.
Excavations have been taking place on the site of the legendary crusader castle since the early 1990s. Archaeologists and forensic experts have examined the remains of six fallen crusaders and uncovered fascinating details about the Battle of Chastellet. The programme has secured access to the excavation and remains of some of the 80 Crusader Knights and 750 foot soldiers stationed at the fort when it was attacked and its Crusaders massacred by Saladin's army in 1179, in the battle that changed the course of history in the Middle East.