It's frightening and unnerving to watch a stone melt.

Even in winter an isolated patch of snow has a special quality.

If you've ever come across a tree that you've lived with for many years and then one day it's blown over, there's incredible shock and violence about that.

The main reason I went to digital was because I got time-lapse, video, and still images all in one camera. Having a minimal amount of gear is really important for someone who wants to walk around. That allowed me to have this flexibility to document things in different ways.

The first snowball I froze was put in my mother's deep freeze when I was in my early 20s.

Not being able to touch is sometimes as interesting as being able to touch.

I have worked with this red all over the world - in Japan, California, France, Britain, Australia - a vein running round the earth. It has taught me about the flow, energy and life that connects one place with another.