Jerry Monkman / A man kayaking on Branch Lake in Ellsworth, Maine, USA. Model Released. June 2008

Jerry Monkman / Moores Brook, Ellsworth, Maine, USA. Moores Brook empties into Branch Lake. June 2008

Bryan and Cherry Alexander / Chilean Traverse, pulled by the Camoplast, to survey the Ellsworth under-ice lake, Antarctica, January 2006.

Bryan and Cherry Alexander / Twin Otter delivering supplies to the Chilean Traverse, which is surveying the Ellsworth under-ice lake. Antarctica, January 2006.

Bryan and Cherry Alexander / Twin Otter delivering supplies to the Chilean Traverse, which is surveying the Ellsworth under-ice Lake. Antarctica, January 2006.

Bryan and Cherry Alexander / Tracks left by the the Chilean Traverse, pulled by the Camoplast, to survey the Ellsworth under ice Lake. Antarctica, January 2006.

Bryan and Cherry Alexander / Chilean Traverse, pulled by the Camoplast, to survey the Ellsworth under ice Lake. Pirit Hills on the horizon, Antarctica, January 2006.

Bryan and Cherry Alexander / Ski sailing against a backdrop of the Ellsworth Mountains. Patriot Hills, Antarctica, January 2006.

Bryan and Cherry Alexander / Stratocumulus cloud formation hanging over the Ellsworth Mountains while a higher stratus formation is backlit over the Polar Plateau, Antarctica, January 2006.

Bryan and Cherry Alexander / Snow patches on blue ice at the foot of Patriot Hills with orographic cloud formation over the Ellsworth Mountains. Antarctica, January 2006.

Bryan and Cherry Alexander / Peaks of the Ellsworth Mountains, with orographic clouds above and blue ice below. Antarctica, January 2006.

Bryan and Cherry Alexander / Two snowmobiles on the blue ice in front of the Ellsworth Mountains, with orographic clouds above. Antarctica, January 2006.

Bryan and Cherry Alexander / Icefall behind Vinson Base Camp, with tents in foreground. Vinson Massif, Ellsworth Mountains, Antarctica, January 2006.

Bryan and Cherry Alexander / Rocky peak in the Ellsworth Mountains with a dramatic wind scoop, and an Arete running diagonally. West Antarctica, January 2006.

Bryan and Cherry Alexander / The Minaret Peak, which is Late Cambrian and part of the Marble Hills Heritage Range. Ellsworth Mountains, West Antarctica, January 2006.

Jerry Monkman / Trees downed by American beavers {Castor canadensis} beside Moores Brook, Ellsworth, Maine, USA. June 2008

Jerry Monkman / Bunchberry {Cornus canadensis} flowering beside a fallen Paper birch tree, Ellsworth, Maine, USA. June 2008

Jerry Monkman / Ferns and a lichen-covered (Lobaria Pulmonaria) maple tree next to Moores Brook, Ellsworth, Maine, USA. June 2008

David Tipling / Tented 'Adventure Network International' (ANI) camp, Patriot Hills, Ellsworth Mountains, Antarctica

David Tipling / Ellsworth Mountains, Antarctica

Colin Monteath / Climber on the summit of Mt Shinn after the first ascent of the east ridge, Ellsworth Mountains, Antarctica

Colin Monteath / Mountain climber approaching summit of Vinson Massif, the highest peak in Antarctica, Ellsworth Mountains, Antarctica

Colin Monteath / Climber on summit ridge, new route on Mt Shinn, Ellsworth Mountains, Antarctica

DAVID TIPLING / Tents. Patriot hills, Ellsworth Mountains, Antarctica

DAVID TIPLING / Snow storm. Patriot hills, Ellsworth Mountains, Antarctica

DAVID TIPLING / Securing tents during snow storm. Patriot hills, Ellsworth Mountains, Antarctica

Colin Monteath / Mt Shinn and Mt Tyree seen from Vinson Massif, the highest mountains in Antarctica, Ellsworth Mountains, Antarctica

Colin Monteath / View at midnight from Vinson Massif, looking towards Mt Shinn and Mt Tyree, Ellsworth Mountains, Antarctica