Perhaps you could say that mountaineers are driven by ego or our competitiveness, but there's a lot more to it than that. Whether it's a huge face in the Himalaya or some crag in the woods behind your house, exploration offers us a unique perspective on the world that you can't really find anywhere else.

Specifically choose not to take a GPS. Just create a challenge. You can climb Everest or walk across Antarctica with minimal gear and still have that sense of adventure. But in terms of exploration, Google Earth has this world mapped down to the square foot.

Climbing, as my grandmother said, it's a pretty frivolous thing. She always wondered when I was going to get a real job. But climbing is a real job for me now, and I enjoy it. It's a gift that I'm able to do it, share adventure and motivation with people.

It's our human nature to explore. Tens of thousands of years ago, our species walked out of Africa, traveling far and wide across the entire planet, from the Arctic to the tip of Tierra Del Fuego, making us the most geographically diversified species on Earth.

I always tend to write about outsiders. And what's been fun for me is, as I travel around and visit schools, is that other kids that feel the same way relate to some of my characters, and so I hope in some way that's helping them when they want to read about somebody that they can relate to.

I only travel to good material, a good director and a good company. I won't work in another country for a year any longer, because I have a lovely wife and I adore her and I can't bear to be away from her.

My first experiences of Colorado travel have been rather severe. At Greeley, I got a small upstairs room at first, but gave it up to a married couple with a child, and then had one downstairs no bigger than a cabin, with only a canvas partition. It was very hot, and every place was thick with black flies.

My position in the army is as sport instructor. This allows me generous time off for travel and competition. I also receive a monthly salary from the army.