Cartier returns to the St. Lawrence region for a second and third time

French mariner Jacques Cartier sets out to explore North America

The final years of Burton

The feud between Burton and Speke is brought to a public debate

John Hanning Speke takes a side trek and comes upon Lake Victoria

Burton goes searching for the great inland lake of East Africa

Burton attempts to reach the city Harar

Burton goes undercover to go on his Hadj

Burton's early years, including his time in India

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