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Thirteen
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Season 3 Episodes
7 episodes
1
Why Magnetic Sand Pulls Millions of Sea Turtles to One Tiny Beach
Each fall, a remote stretch of volcanic sand in Costa Rica transforms into one of nature’s greatest spectacles: Tens of thousands of sea turtles arrive en masse and nest in unison. But this breathtaking event hides a surprising paradox that may actually help save the species.
2
The Hidden Danger of the Northern Lights
At a rocket test range in Alaska, scientists are firing rockets into the northern lights. They want to better understand the aurora because they are the visible fingerprint of a powerful and dangerous force that can disrupt GPS, satellites, and power grids. We join them at a launch to find out what they've discovered.
3
America Made Its Most Toxic Lake. Now We Need What's Inside.
America’s most toxic lake may also be one of its most overlooked resources. At the Berkeley Pit Superfund Site, scientists are extracting clean energy materials from a century of mining waste.
4
We Saw What AI Data Centers Don't Want You to See
We investigated one of the world’s largest AI data centers, using thermal drone footage to reveal the hidden pollution powering the AI boom. As companies race to build the future of artificial intelligence, residents and experts warn that fossil fuels, secrecy, and weak regulation may be putting communities at risk.
5
Why Does This Swamp Keep Catching Fire?
In 2011, a fire in the Great Dismal Swamp burned for 111 days. Even a foot of rain from Hurricane Irene failed to extinguish it. The reason was hidden underground in layers of peat, one of Earth's most important carbon stores. What started this fire reveals a surprising story about climate change, America's complicated history, and one of the continent's most remarkable landscapes.
6
How This Dying Rainforest Is a Sign of Things to Come
In Costa Rica’s cloud forest, a biological paradox unfolds: one of America’s wettest ecosystems is dying of thirst. Our investigation follows daring ecologists as they scale 70-foot canopies to solve this high-altitude "whodunit."
7
This Island Has Been A Science Experiment for 100 Years
Deep in Panama’s Barro Colorado Island, scientists are investigating a mystery that has puzzled them for decades. Why are giant tropical trees dying? The answer leads to lightning, a remarkable tree species, and a hidden battle for survival in one of the world’s most important forests.