Bryan and Cherry Alexander / Northern lights (Aurora borealis) over a Nenets herders' camp. Yamal Peninsula, Western Siberia, Russia, 2001.

Florian Möllers / Chinese fisherman on his raft with Great Cormorant (Phalacrocorax carbo sinensis), silhouetted against the karst hills at the Li River. Yangshuo, Guangxi, China, November.

Nick Garbutt / Dawn over the Segama River, with mist hanging over lowland rainforest. Heart of Danum Valley, Sabah, Borneo.

Dr. Axel Gebauer / Red panda (Ailurus fulgens) habitat, at dusk, Pangolakha Wildlife Sanctuary, Sikkim, India

David Noton / Chocolate Hills, Bohol, The Visayas, Philippines. February 2011.

Enrique Lopez-Tapia / Wildlife viewing platform, with chital deer (Axis axis) in the distance, Sundarbans National Park, the largest mangrove swamp in the world. Bangladesh. UNESCO World Heritage Site. June 2012.

Franco Banfi / Reef covered with hard corals, Brush Coral (Acropora hyacinthus) Robust Acropora (Acropora robusta) and other Acropora, Maldives, Indian Ocean

Juan Carlos Munoz / Aerial view of the River Kinabatangan and riverine tropical rainforest, Sabah, Malaysia, Borneo, Asia.

Anup Shah / Gelada baboon (Theropithecus gelada) male sitting on cliff edge against backdrop of Simien Mountains, Simien Mountains National Park, Ethiopia, November

Alex Hyde / Boabab trees {Adansonia grandidieri} in evening light. Morondava, Madagascar, October 2009

Inaki Relanzon / Fishermen on their boat in front of sunlit clouds. Ramena beach, Diego Suarez (Antsiranana) in north Madagascar, June 2007.

Ernie Janes / Erg Chebbi Dunes, Sahara Desert, Morocco, North Africa, March 2011.