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.

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

I soon realised that what had happened on a small scale cannot necessarily be repeated on a larger scale. The stones were so big that the amount of heat required was prohibitively expensive and wasteful.

Nature, for me is raw and dangerous and difficult and beautiful and unnerving.

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 stones tear like flesh, rather than breaking. Although what happens is violent, it is a violence that is in stone. A tear is more unnerving than a break.

People also leave presence in a place even when they are no longer there.