To get ready to climb Everest, I did a lot of hill running with a daypack on and a lot of underwater swimming. I would swim a couple of lengths underwater and then a couple above. It gets your body going with limited oxygen.

Unless you have shelter, fire is going to be very hard and if you have fire, but no water, you're going to die. They're all super important.

To get ready to climb Everest, I did a lot of hill running with a daypack on and a lot of underwater swimming. I would swim a couple of lengths underwater and then a couple above. It gets your body going with limited oxygen.

I do see a lot of the hard end of ecology, and my feeling is that we live on a super-exciting planet but a super-fragile one.

I learnt another valuable lesson that night: listen to the quiet voice inside. Intuition is the noise of the mind.

There is no feeling like coming home after danger.

Change the way you use your time, and you change your life.