Weather forecasting for Everest is better than it used to be, but huge mountains remain dangerously unpredictable.
Skiers at Sochi must combat slushy courses with secret wax technology.
The cold is insidious and dangerous. Learn a bit about how to survive in winter's worst.
Exercising outdoors can be safe, even exhilarating -- just dress right.
Simon Beck creates uses snowshoes to create huge works of art, often based on mathematical patterns, that look like crop circles.
The human body is much better at adapting to heat than to cold. But eventually, the body does make some adjustments.
Nearly 70 people have died on Everest since 2000, but safety advances have improved climbers' odds.
As a tanker filled with fuel slices toward iced-in Nome, Alaska, we talk to a crewmember of a ship featured on Discovery Channel's show 'Bering Sea Gold' who lives there.