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 more information on this episode, visit nationalgeographic.com/overheard.
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Jul 2023
Trapped in the icy waters of the Northwest Passage
For centuries, the Northwest Passage, the long-sought sea route connecting the Atlantic and Pacific Oceans through northern Canada, was a holy grail of Arctic exploration. Even now, sailing through it isn’t guaranteed. Mark Synnott, a National Geographic Explorer, writer, and adv ... Show More
34m 16s
Jul 2023
Playback: Modern Lives, Ancient Caves
There’s a lost continent waiting to be explored, and it’s right below our feet. We’ll dig into the deep human relationship to the underground—and why we understand it from an instinctive point of view, but not so much from a physical one. (Hint: We’re afraid of the dark.) In an e ... Show More
28m 39s
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Playback: This Indigenous Practice Fights Fire with Fire
For decades, the U.S. government evangelized fire suppression, most famously through Smokey Bear’s wildfire prevention campaign. But as climate change continues to exacerbate wildfire seasons and a growing body of scientific research supports using fire to fight fire, Indigenous ... Show More
29m 8s
Aug 2025
FAN FAVORITE: Teddy Roosevelt's Amazon Expedition | River of Doubt | 2
As Theodore Roosevelt’s expedition sets off down the River of Doubt, it doesn’t take long for the going to get rough. Their canoes are no match for the boiling rapids, forcing them to trek through an unforgiving jungle rife with insects, predators and disease. As their movement s ... Show More
43m 39s
Jan 2023
Uncharted: Teddy Roosevelt's Amazon Expedition | Headwaters | 1
In 1913, former President Theodore Roosevelt embarked on a perilous expedition to explore one of the last unmapped rivers in the Amazon. Roosevelt was joined by his son Kermit, famed Brazilian explorer Candido Rondon, and a team of naturalists and porters. But as the party sets o ... Show More
44m 37s