Doug Perrine / Bioluminescence from glowing plankton in sea tide line on beach, with stars above and ship lights on horizon, Vaadhoo Island, Raa Atoll, Maldives, Indian Ocean, October 2010
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Gerry Ellis / Blue Wildebeest (Connochaetes taurinus) herd migrating in a line, Masai Mara National Reserve, Kenya
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Gerry Ellis / Burchell's Zebra (Equus burchellii) herd migrating through approaching storm, Masai Mara National Reserve, Kenya
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Pascal Tordeux / An old Oak tree (Quercus robur) that survived on the front line of the World War One, in the region of Saint Quentin, Picardy, France, February 2012
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Tim Fitzharris / Rainbow Vista, Valley of Fire State Park, Nevada
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Theo Allofs / Drought patterns in coastal mud plains, Skeleton Coast, Namib Desert, Namibia
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Doug Perrine / Bioluminescence from glowing plankton in sea tide line on beach, with stars above and ship lights on horizon, Vaadhoo Island, Raa Atoll, Maldives, Indian Ocean, October 2010
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Ingo Arndt / King Penguin (Aptenodytes patagonicus) group on beach, Volunteer Point, Falkland Islands
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Ingo Arndt / King Penguin (Aptenodytes patagonicus) group on beach walking into surf, Volunteer Point, Falkland Islands
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Ingo Arndt / King Penguin (Aptenodytes patagonicus) group on beach walking into surf, Volunteer Point, Falkland Islands
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Pete Oxford / Gentoo Penguin (Pygoscelis papua) group, Sea Lion Island, Falkland Islands
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Konrad Wothe / Sand dunes in the Libyan Desert, Libya
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Konrad Wothe / Sand dunes in desert landscape, Libya
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Konrad Wothe / Sand dunes in desert landscape, Libya
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Stephen Belcher / Sand dunes with a line of trees in the foreground, Namib-Naukluft National Park, Namibia
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Konrad Wothe / Algodones Dunes showing ripples, southern California
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Tim Fitzharris / Palm trees line Penca Beach, Costa Rica
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Tim Fitzharris / Palm trees line Carillo Beach, Costa Rica
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Tim Fitzharris / Palm trees line Pelada Beach, Costa Rica
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Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) group standing in a row, Antarctica
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Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) group, Antarctica
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Pete Oxford / Dromedary (Camelus dromedaries) group, domesticated animals with pasturalists in the Thar desert, Rajasthan, India
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Pete Oxford / Dromedary (Camelus dromedaries) group, domesticated animals with pasturalists in the Thar desert, Rajasthan, India
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Pete Oxford / Dromedary (Camelus dromedaries) group, domesticated animals with pasturalists in the Thar desert, Rajasthan, India
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Suzi Eszterhas / Blue Wildebeest (Connochaetes taurinus) crossing grasslands beneath a rainbow, Masai Mara National Reserve, Kenya
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Tui De Roy / Palmyra Atoll, a wet, equatorial atoll with fringing reefs, native forests and abundant seabirds, Palmyra Atoll National Wildlife Refuge, US Line Islands
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Barry Bland / A man navigating by Sextant, a measuring instrument generally used to measure the angle of elevation of a celestial object above the horizon. Model Released. ^^^Making this measurement is known as sig...
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Barry Bland / A man navigating by Sextant, a measuring instrument generally used to measure the angle of elevation of a ^^^celestial object above the horizon. Making this measurement is known as sighting the object...
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Onne van der Wal / Two sailboats on the horizon line in the middle of the Atlantic Ocean, during the 2006 Newport to Bermuda race.
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Ingo Arndt / King Penguin (Aptenodytes patagonicus) group walking on beach, Volunteer Point, Falkland Islands
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Suzi Eszterhas / Blue Wildebeest (Connochaetes taurinus) crossing grasslands beneath a rainbow, Masai Mara National Reserve, Kenya
