Gavin Maxwell / Rongbuk Glacier with Mount Everest, Tibet, June 07. 'Wild China' series

Gavin Maxwell / Mount Everest and Rongbuk Glacier, Tibet, June 07, 'Wild China' series

Gavin Maxwell / Mount Everest and Rongbuk Glacier, Tibet, June 07, 'Wild China' series

Gavin Maxwell / Rock pile and prayer flags with Mount Everest and Rongbuk Glacier, Tibet, June 07, 'Wild China' series

Gavin Maxwell / Rongbuk Glacier with Mount Everest in background, June 2007, Tibet. 'Wild China' series

Colin Monteath / Skier descends Central Rongbuk Glacier with Mount Everest in the background, Tibet

Colin Monteath / Skier on central Rongbuk Glacier, underneath the west ridge of Mount Everest during an ascent of the north face, Tibet

Leo & Mandy Dickinson / North face of Everest with Rongbuk glacier in foreground, Tibet.

Tui De Roy / Mt Everest showing the north face and Rongbuk Glacier from advance base camp, Rongbuk Valley, Tibet

Leo & Mandy Dickinson / Base camp and yaks, Rongbuk Glacier, Mt Everest in distance, Tibet

Leo & Mandy Dickinson / North face of Everest, Rongbuk glacier in foreground, Tibet

Nick Groves / Ice towers on East Rongbuk Glacier, Mount Everest, Tibet