Uncharted: Teddy Roosevelt's Amazon Expeditio...

Searching for lost cities in the Amazon sounds like something out of a Hollywood script – unless you’re University of Florida anthropologist Mike Heckenberger. He’s been visiting the Amazon for three decades, working with local tribes and uncovering a network of ancient cities in ...  Show more

In 1965, with Cold War tensions escalating, the CIA and India’s Intelligence Bureau joined forces to spy on China’s budding nuclear program. Satellites and spy planes at the time were unreliable, so the agencies hatched an unusual plan: place a nuclear-powered spying device atop ...  Show more

Teddy Roosevelt was not afraid to tempt death. He hiked the Matterhorn during his honeymoon. He arrested outlaws on the Dakota Frontier. He hunted rhinos in Africa. But his most dangerous journey came after his failure in 1912 to retake the presidency as a third-party candidate o ...  Show more

"The ordinary traveler, who never goes off the beaten route and who on this beaten route is carried by others, without himself doing anything or risking anything, does not need to show much more initiative and intelligence than an express package." Welcome back to another episode ...  Show more

As a boy growing up in Peru, Andrés Ruzo recalls his grandfather’s stories about the horrors Spanish conquistadores encountered in the Amazon, including a “boiling river.” Years later, Ruzo, a National Geographic Explorer, journeys into the Amazon to try to find the waterway. For ...  Show more

In Papua New Guinea, deep in the jungle, a group sets off on a rafting trip. 17-year-old Zamon Kingi and his friend Andrew are having a blast… until the fun abruptly stops. When their raft hits a waterfall, Andrew and another member of the party are separated from the group. Zamo ...  Show more