The extremes of jungles, mountains, and deserts are inherently dangerous places.

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.

The hardest thing about my job isn't the snake bites or the crocodiles, it's being away from my children. I have a really religious satellite phone call every day back to the boys, wherever we are, whatever time zone, to say goodnight.

The difference between ordinary and extra-ordinary is so often just simply that little word - extra. And for me, I had always grown up with the belief that if someone succeeds it is because they are brilliant or talented or just better than me... and the more of these words I heard the smaller I always felt! But the truth is often very different... and for me to learn that ordinary me can achieve something extra-ordinary by giving that little bit extra, when everyone else gives up, meant the world to me and I really clung to it.

Adventure should be 80 percent 'I think this is manageable,' but it's good to have that last 20 percent where you're right outside your comfort zone. Still safe, but outside your comfort zone.

That feeling when you're so cold you'd give anything to be warm - I've had it before, literally huddled around a candle flame on an ice sheet.

In the British Special Air Service, combat fitness is all about running.