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As the alpha male of the first pack to live in Oregon since 1947, he was beloved by conservationists. Then he broke one too many rules.

Sarah Gerhardt, the first woman to surf Mavericks, on her long path from homelessness to the top of a monster wave

She worked tirelessly with her husband to conserve one of the last wild places on earth. Since his tragic death, she's worked even harder.

How the mysterious disappearance of a boat in the Bering Sea changed Alaskan fishing

Reality TV stars never have long careers. So how come Grylls is charging harder than ever?

The acclaimed author of 'Wild' shares her process and philosophy with Tim Ferriss

Efforts to manage human waste in national parks have failed miserably. Now a creative scientist may have found an elegant remedy.

Evolution has made humans instinctually crave sugary, fatty, and salty foods. Here's how you can fight back.

On the border between Russia and Finland, a band of Finnish soldiers are preparing to defend the country if the Bear decides to charge

The bestselling author on going deep with great white sharks, big-wave surfers, and dolphins—plus her concerns about the future of the sea

If you found yourself stuck at the bottom of a canyon with a broken leg, what do you do? Not long ago, our host faced this exact scenario.

The cofounders of the wildly popular program explain why the easiest way to get in better shape is to make healthy living a game

A bee sting won't hurt you unless you're allergic—or so you thought until you disturbed a hive of African bees

When you picked some mushrooms off the forest floor, you planned to make a nice risotto. But now you're in the hospital, fighting for your life.

A team of scientists entered a glass bubble in the desert to live for two years cut off from society. Things didn't go as planned.

You're alone in the open sea on a surfboard, blown far offshore by a strong wind. What does it feel like? What do you do?

A remote car accident, a broken ski, a tumble in the snow, and a slow descent into hypothermia

You may soon be able to change your DNA to optimize performance in your favorite sport

Former Navy SEAL doctor Kirk Parsley insists getting enough rest is the single most effective performance-enhancing habit

As endurance predators, we should be able to catch anything—even one of the world's fastest animals

The renowned expert in high-performance psychology offers up an incredibly simple approach to training your mind

Writer Kevin Fedarko went looking for meaning in the bottom of the Grand Canyon. He ended up in charge of a boat full of poop.

The power couple shares lessons from their extreme approach to training, nutrition, and recovery

Fighting one invasive species with another has led to some famous horror stories. But biocontrol can be done right.

On his new album, the king of kick-back beach music takes a bold turn. He tells us why.

Cycling legend Rebecca Rusch discusses Blood Road, the new documentary on her journey down the Ho Chi Minh trail to find the crash site where her father disappeared.

The co-founder of GirlTrek explains how an organization encouraging women to head out the door became a powerhouse national movement

To the protectors of Alabama’s swamps, the vanishing of an iconic river creature posses terrifying questions about the water we swim in and fish in and drink.

When some friends sewed together a couple jock straps to stop boob bounce in the late-70s, they ignited a revolution

We tried to have a serious conversation with the SNL alum about his new HBO cycling mockumentary. We mostly failed.

When Bob Sturtz had a stroke in the Boundary Waters, his friend Scott Pirsig had only one choice: get out and get help as fast as possible.

Sarah McNair-Landry, one of today’s boldest young explorers, describes the unique thrill of crossing the Arctic on skis.

There's a flipside to dehydration that kills athletes and otherwise healthy people every year. And it's on the rise.

What does it take to swim 111 miles from Cuba to Florida without a shark cage? Passion bordering on obsession.

Mona Seraji's unlikely path to becoming the first snowboarder from the Middle East, male or female, to compete in the pro freeride series

Humans are on the brink of technologies that can control the weather and possibly save us from climate change. But playing God is risky business.

When forecasts called for a massive tornado in central Oklahoma in 2013, storm chasers flocked to the area. Then all hell broke loose.

How a bold women’s climb of a Himalayan giant shocked the world and forever changed mountaineering

The star climber opens up about her kidnapping and finding love after a broken marriage

Once Joe Stone learned to use his paralyzed body, he decided he’d race an Ironman. Then he went even bigger.

What do you do when you’re addicted to adrenaline but confined to a wheelchair? So much more than people expect.

Myles Osborne was poised to summit Mount Everest when a flapping of fabric caught his eye. He thought it was a tent—then it spoke.

In her new book, the writer explains why getting outside cures so many of our problems

The story of two explorers chased down—well, technically up—by a jaguar

Denmark's Faroe Islands have a brutal tradition in which men publicly butcher hundreds of pilot whales by hand. But why?

He's spent the last three years chronicling the lives of couples who have swapped mainstream society for rare kind of freedom

Wolf howls, bird songs, crickets, frogs—soundscapes contain clues to not only what's going on around us but also who we are.

Secretary of the Interior tells all: what's next for the Department of the Interior and the environmental movement?

Now that they have the black box, what's next?

The hunt for the truth about Eastern Air Lines Flight 980

How two friends from Boston solved the world's greatest aviation mystery, Eastern Air Lines Flight 980

Ian Frazier has had it with people calling favorite outdoor spots “cathedrals,” “shrines,” and “sacred spaces.” Here's why.

Why environmental scientists are transforming big data into music

His journey from dirtbag to rock star, how to choose a climbing partner, and why bottled oxygen might be a performance-enhancing drug

An inside look at America's history with doping and double standards related to performance enhancement

The "human guinea pig" talk about his 4-hour plan to being good at, well, everything

The incredible story behind a journalist's terrifying journey through high-conflict jungle

He was kidnapped, survived an assassination attempt, and joined the hunt for the most deadly terrorist. Meet the most interesting man alive.

Alone, deep underwater inside a sunken ship, with only minutes to survive, Michael Proudfoot's survival story might be the most epic to date

When your submarine is on the verge of imploding, you better make all the right choices

When a group of immigrants set out across the desert, the results helped researcher create the Death Index, a new model for dehydration.

Pablo Valencia spent six days wandering the 110-degree desert before stumbling into McGee's camp. He shouldn't have been alive, but he was.

The bizarre science behind Phil Broscovak's lightning strike, and his incredible journey of recovery

A remote car accident, a broken ski, a tumble in the snow, and a slow descent into hypothermia before (spoiler alert!) a dramatic rescue