Water is the key to life, but in frozen form, it is a latent force. And when it vanishes, Earth becomes Mars.

Biodiversity starts in the distant past and it points toward the future.

I think a photograph, of whatever it might be - a landscape, a person - requires personal involvement. That means knowing your subject, not just snapping at what's in front of you.

Tourism is important because it can create sustainable local economies. I'd much rather have 1,000 tourists going up the Tambopata than 1,000 gold miners.

I want to interpret the natural world and our links to it. It's driven by the belief of many world-class scientists that we're in the midst of an extinction crisis... This time it's us that's doing it.

A lion is not a lion is not a lion. As individuals, as mates, as members of a society, they're all very different.