Carol Walker / Two wild pinto Mustang stallions battle for dominance in Sand Wash Basin, Colorado, USA.
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Michael Pitts / Eastern Island showing the WW2 airstrip which was used to launch the initial attack on the Japanese fleet for the Battle of Midway, Midway, Central Pacific.
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Anup Shah / Lioness (Panthera leo) trying to protect cubs from charging Cape buffalo herd (Syncerus caffer caffer), Masai Mara National Reserve, Kenya
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Kristel Richard / Traditionally dressed Berber warriors, mounted on Barb and Arab Barb horses, galloping into battle firing their guns down during the Fantasia in Dar Es Salam, Morocco, June 2010
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Mark Carwardine / Humpback whale (Megaptera novaeangliae) slapping the surface during courtship battle, Sea of Cortez, Baja California, Mexico
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Ashley Cooper / Funafuti Atoll, Tuvalu. These low lying islands are very susceptible to sea level rise, March 2007
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Ashley Cooper / Mountaineer in blizzard, Cairngorm Scotland UK. February 2007
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Ashley Cooper / Mountaineer in blizzard, Cairngorm Scotland UK. February 2007
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Ashley Cooper / Mountaineer in blizzard, Cairngorm Scotland UK. February 2007
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Ashley Cooper / Protesters campaigning against fracking by Cuadrilla, as Cuadrilla appeals the local council decision not to allow fracking. Lancashire, England, UK, February 2016.
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Ashley Cooper / Protesters campaigning against fracking by Cuadrilla, as Cuadrilla appeals the local council decision not to allow fracking. Lancashire, England, UK, February 2016.
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Graham Eaton / Sverd i fjell, Hafrsfjord, Stavanger, Norway, March. The three bronze swords stand 10 metres (33 ft) tall and are planted into the rock of a small hill next to the fjord. They commemorate the historic...