Climbing mountains is one of the most dangerous things hobbies in the world. No matter how prepared a climber is, the unexpected can always sweep in and change everything.

While Mount Everest is undoubtedly the most recognized mountain in the world, that doesn’t mean it’s the toughest to climb. That title might just belong to another mountain that’s much less forgiving of mistakes.

Expert mountaineer Vanessa O’Brien thinks K2, the second highest mountain in the world, is a far tougher climb. Here’s why:


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