Water is life, we’re told. But what if you drink too much? As it turns out, there’s a little-discussed flipside to dehydration called hyponatremia—and it's been on the rise, killing athletes and otherwise healthy people every year. And while you may think you know how much you need to drink, chances are you're wrong.

What does it take to swim from Cuba to Florida without a shark cage? According to Diana Nyad, the answer is passion bordering on obsession. Nyad first attempted the 111-mile crossing in 1978. Thirty-five years later, at the age of 64, following four failed efforts that left her devastated, she became the first person to complete the crossing, stroking for 53 hours almost nonstop. During her swims, Nyad encountered near-deadly box jellyfish stings, horrendous saltwater chafing, hallucinations, and sea sickness. Now she's turned the experience into a one-woman play that she wants to bring to Broadway. Outside contributing editor Florence Williams drops in on the unstoppable athlete and amazing storyteller at her LA home to talk about her long journey—and where she's headed next.

Mona Seraji is the first snowboarder from the Middle East to compete professionally in the Freeride World Qualifier, a series of big-mountain events that attract the best riders in the world. She's also a talented surfer, rock climber, and mountain biker. All this is more impressive when you consider the fact that in her home country of Iran, Seraji faces strict rules about how women can participate in athletics. Women aren’t allowed in sports stadiums, for example. They’re discouraged from riding bicycles in public. They can be arrested for showing too much skin or hair. In the United States, that sort of stuff is pretty much all we hear about female athletes—and women generally—in the Middle East. But it’s only part of the picture. Outside contributing editor Florence Williams talks with Seraji to get the real deal and hear how the athlete's powerful ambition enabled her to break new ground. 

Human beings spent centuries trying to control the weather. Then, about 70 years ago, we figured out the basics of what it takes to make it rain. Now, we're controlling more weather than you might think—and on the brink of a technology that may save us from the effects of climate change. But only if we're ok with playing God.

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Science can’t fully explain why and how tornadoes form. But on May 31, 2013, all the factors we do understand pointed towards off-the-charts risk in central Oklahoma. Hundreds of amateur storm chasers, professional meteorologists, and thrill-seekers flocked to the area expecting an incredible storm. What actually touched down blew them all away. 

Back when men still believed the “weaker sex” were inferior climbers, Arlene Blum led a women’s ascent of Annapurna, the world’s tenth-highest peak. The 1978 climb put the first women—and first Americans, period—on the summit, but the death of two climbers sparked a controversy. Outside contributing editor Florence Williams talks with Blum and Alpinist editor in chief Katie Ives about why the expedition continues to inspire climbers and stir debate. 

In the 1990s, Beth Rodden was a climbing prodigy, celebrated for her athletic gifts and unwavering discipline. Then, while on an expedition in Central Asia in 2000, she and her small team of friends were kidnapped. That terrifying ordeal—and their daring escape—changed her life in ways she has only recently begun to understand. In a revealing conversation with Outside contributing editor Florence Williams, Rodden opens up about the price of perfectionism, blowing up her marriage to climbing superstar Tommy Caldwell, and moving forward as an athlete and new mother.

Once Joe Stone learned how to use his paralyzed body, he immediately set an audacious goal: he would race in an Ironman triathlon—despite the fact that no quadriplegic athlete had ever attempted the event. And after that? Well, Joe decided he could go much, much bigger.

Joe Stone doesn’t do anything halfway. Back when he was a skater, he went big. When he partied, he went hard. When he took up skydiving and speed-flying, he flew almost every day. Then one day he crashed and became a C7 quadriplegic. What do you do when you’re addicted to adrenaline but confined to a wheelchair? A lot of stuff that no one else has ever done before.

On the morning of May 25, 2006,  Myles Osborne was poised to become one of the last climbers of the season to summit Mount Everest. The weather was perfect, and it seemed nothing would stop his team. Then a flapping of orange fabric caught his eye. He believed it to be a tent—until the fabric spoke: “I imagine you’re surprised to see me here.” The speaker was Lincoln Hall, who'd been reported dead the night before. He was gloveless, frostbitten, and hallucinating—but alive. Osborne's expedition was faced with a dilemma: would they stay and help Hall, giving up the summit and endangering their own lives? Or finish this once-in-a-lifetime journey that had been years in the making? We explore the choice they made and look into the fascinating science around how we make decisions in high-risk environments—and live with them afterward.