Alaska is a land of extremes: the biggest, coldest, windiest, and wildest. Its climate and land forms are shaped by two oceans, the moving Earth, and frozen polar air. Through it flows the Yukon River, perhaps the last untamed river in North America. Beautiful photography modified with computer images show how populations and natural forces have changed the land. Intimate portraits show the spirit of the people native to Alaska, and those who came...

Did a number of explorers discover the New World long before Christopher Columbus staked his claim in 1492? Explore the possibility that the Chinese, Japanese, Polynesians, Norse, Welsh, Irish, Ancient Hebrews, and the Solutreans all made it to the Americas earlier than Columbus. Rebuild the ships, trace the routes, test the artifacts, and analyze blood evidence to finally learn the answer to one of the greatest mysteries of all time: who really discovered...

The historic Arctic expedition put climate change on the map. Over 250 scientists from 26 countries searching for the truth. The historic and dangerous journey will be remembered for decades to come.

The latest discoveries reveal the true story of Jamestown as you've never seen it before. With exclusive access to forensics and archaeology, National Geographic reveals shocking new evidence of starvation and disease, secret plots and Spanish spies.

When Columbus stepped ashore in 1492, millions of people were already living in America. It wasn't exactly a 'New World, ' but an old one whose inhabitants had built a vast infrastructure of cities, orchards, canals, and causeways. But after Columbus set foot in the Americas, an endless wave of explorers, conquistadors, and settlers arrived, and with each of their ships came a Noah's Ark of plants, animals, and disease. Here is an exploration into...

The lure of the unknown and a love of adventure drew John Wesley Powell and his crew of nine to the last uncharted waters of the American west in 1869, Their goal: to be the first to ride the mighty Colorado River through the Grand Canyon and map its unexplored territory. Experience the explorers' harrowing descents through furious rapids and their wondrous discoveries on land as they overcome treacherous white eater, blistering heat, and near starvation,...

A band of Spanish conquistadors, led by Pizarro, go up the Amazon in search of gold. As the soldiers battle starvation, Indians, the forces of nature and each other, Don Lope de Aguirre (the self-styled "Wrath of God") is consumed by visions of conquering all of South America and leads a revolt, but Aguirre's megalomania turns the expedition into a death trip.

The Pacific Ocean covers one third of the Earth's surface, holds half of the world's water, and hides the deepest place on the planet. It is a place where huge and iconic, rare and dazzling creatures live, and where creatures yet to be discovered lurk. Filmed in cinematic 4K, the program breaks the boundaries between land and sea to present the Pacific Ocean in a way never seen before.