My favorite moments? Where it's all going swimmingly, the sun's out and I've got a fire going and a nice snake on the barbecue.

I've fallen down crevasses, been bitten by snakes, been knocked unconscious, had various limbs broken and once, a heavy camera came plunging down which very nearly decapitated me.

I'm terrified of walking into a room full of people. Sitting down at a dinner table with 15 strangers brings me out in a sweat.

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.

Faith is personal if it's to be real.

I hang out all the time with kids and young scouts and I never meet kids who don't want adventure.

I was always brought up to have a cup of tea at halfway up a rock face.