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At its Northern edge, in the Atacama desert, wildlife has spent millions of years adapting to a life without water.

In south-east Peru there is a region called Madre De Dios, a vast tropical rainforest. But although the landscape and wildlife here are breath-taking, it's also a battlefield.

The seasons in the Highlands of Scotland are harsh, with opportunities fleeting. But animals and people have found ways to succeed there, turning adversity into advantage?burden into beauty. The Scottish Highlands cover twenty thousand square miles of rugged coastline, lochs and mountains, and is home to a thriving wildlife. With summer's relentless sun, the overwhelming nature of the autumn and winter season, and the unpredictability of spring, the Scottish Highlands are plagued with extreme seasons that only the toughest can survive.

Scoured by ice and weathered by storms, the Scottish Highlands cover twenty thousand square miles of rugged coastline, lochs and mountains. Osprey, golden eagles and dippers make the most of their Highland terrain to raise a family, while Atlantic salmon return to spawn in the rivers in which they were born-on the Orkney island of Copinsay.

This is the story of life on the razor's edge. A great mountain chain that spans the whole of the South American continent. In some places, they're an ice-world of massive glaciers. In other parts, a desert wasteland.

After finding strands of human hair buried in Greenland's permafrost, scientists are attempting the impossible: to be the first to reconstruct the identity of a Stone Age human being through nothing but his ancient locks. From scraps of DNA an ancient face appears. Further discoveries in the genetic code threaten to overturn long-held beliefs of how humans populated the earth.

At the heart of the Arabian Peninsula is a nation only 4 years older than Microsoft, famous around the world for its gleaming modern cities - Dubai and Abu Dhabi. But behind the fast cars and the skyscrapers, there lies a compelling and untold story. With unprecedented access, and told through the voices of its people, this fascinating 3-part series reveals how new archaeological and historical discoveries are only now uncovering the true extent of this land's ancient wonders - remarkably advanced civilisations that once held centre stage in world history.

Ever wonder what it takes to fly the President's plane? Or what goes on behind doors at some of the most secretive organizations in the world, like the CIA, the NSA, and the US Secret Service? In SECRET ACCESS, National Geographic shows you, granting you an all-access pass deep inside never-before-seen places. From top secret government organizations to the world’s most elite military units, we'll show you high stakes worlds where disaster waits just around the corner. Journey into a world of secrets, all caught on tape for the very first time.

Albert Speer was HItler's personal architect and successful armaments minister, who managed to convince the world of his innocence of the Holocaust. Over 30 years after his death, historians have unearthed documents proving that the "good Nazi" not only covered up his knowledge of the Holocuast, but also participated in the Nazi art theft.

Legendary archeologist Johan Reinhard spent his career searching for the lost temples of the Inca Empire, discovering all but one: Ausangate, named after one of the most sacred mountains in Peru. Now in his seventies, he's handed the torch to environmental scientist Preston Sowell, who makes a mysterious discovery at an alpine lake near Mt Ausangate that he believes is the lost temple. This film follows Sowell's journey of discovery, loss and adventure as he seeks the truth about this sacred place.