The Roosevelt-Rondon Scientific Expedition comes to a conclusion

Teddy Roosevelt and and Cândido Rondon begin the descent of the River of Doubt

The Roosevelt-Rondon Scientific Expedition head across the Brazilian Highlands to the headwaters of the River of Doubt

The Roosevelt-Rondon Scientific Expedition seeks to map a recently discovered river in the heart of the Amazon

Spanish explorer Juan Rodríguez Cabrillo becomes the first non-native to reach Upper California

James Beckwourth goes from being a slave to one of the most colorful men of the American West

The Quest Expedition and the Legacy of Shackleton

Shackleton must cross the mountains of South Georgia to reach civilization

Shackleton makes a desperate run across the Drake Passage

Shackleton and the men struggle to get out of the ice pack

Shackleton and Endurance head to Antarctica

Ernest Shackleton prepares for his next adventure - the Endurance Expedition

Shackleton has seven weeks to get back to the coast - or risk being stranded in Antarctica for another year

Shackleton makes a run at the South Pole

Shackleton become a public figure even as Antarctica beckons

Shackleton takes part in the 1901 Discovery Expedition

The early life of Shackleton and the Heroic Age of Antarctic Exploration

Alvise Cadamosto explores the west coast of Africa and discovers the Cape Verde Islands

The explorations and legacy of Prince Henry of Portugal

Henry's captains continue to explore down the African coast; Henry tries to take Tangier

The early life of Prince Henry and the discoveries of the Madeira Islands and the Azores

Explorer Andrés de Urdaneta maps the route from the Far East to the New World

The world for Hillary and Tenzing after the 1953 summit of Everest

Hillary and Tenzing make their assault on the summit of Everest

The 1953 British Mount Everest Expedition begins