Conrad Anker had a heart attack at 20,000 feet and lived to tell the tale. Discover his story in #EdgeOfTheUnknown with Jimmy Chin tonight at 10/9c on National Geographic. | National Geographic TV

I would not be the climber I am today if not for Conrad Anker's mentorship. I've had the honor of accompanying him on a number of climbs across the seven continents and the past decades. I always learn something new, both about being in the mountains and being a good human being. Roam Academy's "Climbing Essentials" is Conrad's first ever online climbing course and a unique opportunity for climber's of all experience to receive the ball of wisdom from one of the best ever. Use code Conrad30 to s