Why Climbing Mt. Everest Gives People Weird Boners

We spoke to a mountaineer about the effect high altitude has on blood pressure... and dicks.


The Man Trying to Fix Mount Everest's Towering Poop Problem

Volunteer engineers and architects want to solve Mount Everest's most unsolvable problem: its landfills of human waste.


Center of Attention: Alex Honnold, El Capitan, and the Media Machine

Alex Honnold talks about his historic rope-free ascent of Yosemite's El Capitan, working with film crews, and what comes next.


Watch 'French Spiderman' Scale a 29-Story Hotel with His Bare Hands

The 55-year-old only used a pair of climbing shoes and a bag of chalk.


Insane Human Being Scales Arsenal's Emirates Stadium in Nausea-Inducing Video

Just please don't. Your mother is worried sick about you.


Scaling the "Turquoise Goddess" with Pro Climber Emily Harrington

Earlier this month, Emily Harrington successfully summited Cho Oyu. Her team gave themselves just two weeks door-to-door to summit and ski the "Turquoise Goddess" – and broadcast the entire expedition to the world via social media.


Gear Physics: How Ice Screws Keep Ice Climbers from Falling to Their Deaths

The simple piece of gear that made ice climbing a legit sport.


Watch People Play ‘Pong’ on a Rock Wall With Augmented Climbing

Augmented reality meets indoor climbing


What We Know About 'Steve,' the Guy Who Climbed Trump Tower with Suction Cups

He made it to the 21st floor before getting nabbed.


The Next Generation of Climbers Wants to Stay Indoors

We went to an indoor climbing conference to see how gyms are changing the sport. Hint: more plastic, less rock, and lots of people talking about millennials.


Tragedy and Triumph on Mt. Everest: Two Climbers Dead, Two Others Make History

Two climbers died and two more are missing, but a woman set a new record for ascents by a female, and a combat amputee reached the summit for the first time.


Photo Gallery: A Day at the Office with the Swiss Machine

We spent a day training with Ueli Steck to see how much work goes into being one of the fastest mountaineers in the world.