Alex Mustard / A diver explores Silfra Canyon, a deep fault filled with fresh water in the rift valley between the Eurasian and American tectonic plates at Thingvellir National Park, Iceland. May 2011. In this phot...
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Uri Golman / Head portrait of photographer Uri Golman in temperatures of -40 degrees celsius, with frost in his beard. Greenland. March 2009. Model released
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Jami Tarris / Golden Eagle (Aquila chrysaetos) huntress, Altai Mountains, Bayan Ulgii, Mongolia
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Jami Tarris / Caribou (Rangifer tarandus) entering teepee for food, Khovsgol, Mongolia
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Gary Bell/ Oceanwide / Surfer, Solitary Islands Marine Park, New South Wales, Australia
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Jeff Foott / Hiker near waterfall and rainbow, Nevada Fall, Yosemite National Park, California
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Piotr Naskrecki / Flat Rock Scorpion (Hadogenes granulatus) and hand, Gorongosa National Park, Mozambique
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Piotr Naskrecki / Longhorn Beetle (Tithoes confinis) on hand, Gorongosa National Park, Mozambique
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Piotr Naskrecki / Grasshopper (Tropidacris cristata) on hand, Costa Rica
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Suzi Eszterhas / Mallard (Anas platyrhynchos) rehabilitator, Isabel Luevano, with one day old orphan duckling, International Bird Rescue, Fairfield, California
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Yva Momatiuk & John Eastcott / Ice climber scaling Skaftafellsjokull Glacier, Skaftafell National Park, Iceland
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Yva Momatiuk & John Eastcott / Ice climber scaling Skaftafellsjokull Glacier, Skaftafell National Park, Iceland