Steven Kazlowski / Green Aurora borealis over the Beaufort Sea, seen from the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011
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Juan Carlos Munoz / Northern lights / Aurora borealis over snowy landscape, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis, Iceland, Europe, March 2012
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Erlend Haarberg / Steam vents at night with northern lights, Hverir, Namafjall, Iceland, February 2011
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Orsolya Haarberg / Steam vents with northern lights at night, Hverir, Namafjall, Iceland, February 2011
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Erlend Haarberg / Northern lights over Mount Kirkjufell, Snaefellsnes, Iceland, September 2010
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Erlend Haarberg / Small waterfall near Mount Kirkjufell with aurora borealis in the night sky, Snaefellsnes, Iceland, September 2010
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Erlend Haarberg / Subglacial volcanic eruption under the Eyjafjallajokull ice cap with northern lights above the ash plume at night, Iceland, April 2010
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Erlend Haarberg / Northern light above Ellenvatn Lake, Ovre-Pasvik National Park, Varanger, Finnmark, Norway, February 2007
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Charlie Summers / The transit of Venus across the face of the sun, with visible sunspots, as seen from Aurora, Colorado, USA, 19.51 local time, 5 June 2012.
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Roy Mangersnes / Aurora Borealis above the Arctic Ocean off the northen coast of Finnmark, Norway, April
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Sven Zacek / Northern lights far on the horizon in night landscape. Sarek National Park, Sweden, Europe, September.
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Lassi Rautiainen / Northern lights in moonlit sky, northern Finland, March 2009
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Lassi Rautiainen / Beginnings of the Northern lights in night sky in winter with conifer trees laden with snow, Kuusamo, northern Finland, February 2009
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Juan Carlos Munoz / Northern lights (Aurora Borealis) and moon in sky above Jokulsarlon glacier lagoon. Southern Iceland, Europe, March 2011.
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Juan Carlos Munoz / Northern lights (Aurora Borealis) and moon in sky above Jokulsarlon glacier lagoon. Southern Iceland, Europe, March 2011.
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Charlie Summers / An orbital presentation of the eclipse of the moon as seen from Aurora, Colorado, USA, on the evening of December 20, 2010 and the early morning of December 21, 2010. Composite
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Bryan and Cherry Alexander / Northern lights (Aurora borealis) over a Nenets herders' camp. Yamal Peninsula, Western Siberia, Russia, 2001.
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Bryan and Cherry Alexander / Northern lights (Aurora borealis) over a Nenets herders' camp. Yamal Peninsula, Western Siberia, Russia, 2001
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Bryan and Cherry Alexander / Northern lights (Aurora borealis) over a Nenets herders' camp. Yamal Peninsula, Western Siberia, Russia, 2001.
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Steven Kazlowski / Northern lights (Aurora borealis) across the night sky, over the Beaufort Sea, off shore from the 1002 area of the Arctic National Wildlife Refuge, Alaska September 2009
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Steven Kazlowski / Northern lights (Aurora borealis) across the night sky as the late summer midnight sun travels eastward, over the Beaufort Sea, off shore from the 1002 area of the Arctic National Wildlife Refuge, Ala...
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Michael Durham / Red-legged Frog (Rana aurora) near Circle Creek along coast, Oregon
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Wild Wonders of Europe / Zacek / Northern lights, in snow covered forest, Riisitunturi National Park, Finland, February 2009 WWE BOOK. WWE INDOOR EXHIBITION. Exclusive Japanese calendar rights for 2014
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Wild Wonders of Europe / Zacek / Northern lights, in snow covered forest, Riisitunturi National Park, Finland, February 2009
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Wild Wonders of Europe / Zacek / Northern lights over snow covered forest, Riisitunturi National Park, Finland, February 2009
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Eric Baccega / Northern lights (Aurora borealis) Northwest territories, March 2008, Canada
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Eric Baccega / Northern lights (Aurora borealis) Northwest territories, March 2008, Canada
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Eric Baccega / Northern lights (Aurora borealis) Northwest territories, March 2008, Canada
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Eric Baccega / Northern lights (Aurora borealis) Northwest territories, March 2008, Canada
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Eric Baccega / Igloo lit up at night under northern lights (Aurora borealis) Northwest Territories, Canada March 2007
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Eric Baccega / Igloo under northern lights, Northwest Territories, Canada March 2007
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Matthias Breiter / Northern lights or aurora borealis over illuminated tent, boreal forest, North America
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Matthias Breiter / Northern lights or aurora borealis over boreal forest, North America
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Matthias Breiter / Northern lights or aurora borealis over illuminated tent, boreal forest, North America
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Jim Brandenburg / Aurora borealis, Northwoods, Minnesota
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Michio Hoshino / Aurora borealis over forest, Alaska
Jorma Luhta / Aurora borealis storm colours in night sky, northern Finland, winter
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Jorma Luhta / Aurora borealis storm colours in night sky, northern Finland, February 2002, winter
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Jorma Luhta / Aurora borealis colours in night sky, northern Finland, winter
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Jorma Luhta / Aurora borealis colours in night sky over lake, northern Finland
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Jorma Luhta / Aurora borealis colours in night sky over lake, northern Finland (nr Arctic circle), October 2002. Auroras also occur in the southern hemisphere where they are know as Aurora australis.
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Jorma Luhta / Aurora borealis colours in night sky over lake, northern Finland, October 2002
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Jorma Luhta / Aurora borealis colours in night sky, northern Finland, winter
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Jorma Luhta / Aurora borealis lights in night sky and full moon. Northern Finland, January, winter 2002
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Jorma Luhta / Person watching Aurora borealis colours in night sky, northern Finland, winter
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Jorma Luhta / Aurora borealis colours, moon and Jupiter in night sky, northern Finland, winter 2002
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Jorma Luhta / Aurora borealis bow in moonlit night sky, northern Finland, January, winter 2002
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Jorma Luhta / Green aurora borealis colours in night sky, Lapland, northern Finland, winter. Greeen is the most commonly seen colour in Auroras.
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Jorma Luhta / Aurora borealis storm showing blue corona in night sky, northern Finland.
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Jorma Luhta / Aurora borealis colours in night sky, northern Finland, September 2001. Red corona at beginning of storm
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Juan Carlos Munoz / Aurora borealis and star trails over Jokulsarlon glacier lagoon. Southern Iceland, Europe, August 2012.
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Juan Carlos Munoz / Aurora borealis over Jokulsarlon glacier lagoon. Southern Iceland, Europe, November 2012.
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Niall Benvie / Green aurora borealis light in night sky, Senja, Norway, February 2012
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Ruben Smit / Aurora Borealis over lake, with wooden stump in Laponia, Muddus NP, Sweden
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Charlie Summers / Tree swallow (Tachycineta bicolor) two chicks that have left the nest, beg to be fed on the ground. Aurora, Colorado, USA, July
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Charlie Summers / The Moon (waning crescent) with Venus (below) and Jupiter (above) as seen 50 minutes before a 0545 sunrise on the morning of 15 July 2012 from Aurora, Colorado, USA
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Charlie Summers / The Moon (waning crescent) with Venus (below) and Jupiter (above) as seen just before sunrise on the morning of 15 July 2012 from Aurora, Colorado, USA
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Charlie Summers / Tree swallow (Tachycineta bicolor) female portrait, Aurora, Colorado, USA, July
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Charlie Summers / Tree swallow (Tachycineta bicolor) adult landing next to begging chick, Aurora, Colorado, USA, July
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Charlie Summers / Tree swallow (Tachycineta bicolor) adult feeding a fledgling chick on ground, Aurora, Colorado, USA, July
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Charlie Summers / Tree swallows (Tachycineta bicolor) two perform an aerial dance as they change the guard on their nest, Aurora, Colorado, USA June
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Charlie Summers / Tree swallow (Tachycineta bicolor) female removing fecal sac from nest, Aurora, Colorado, USA, June
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Charlie Summers / Tree swallow (Tachycineta bicolor) adult feeding aggressive chick that clamps its beak around the adults head, Aurora, Colorado, USA July
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Jim Brandenburg / Aurora borealis over lake shore, Lake Superior, Minnesota
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Jim Brandenburg / Aurora borealis over Moose Lake, Boundary Waters Canoe Area Wilderness, Minnesota
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Charlie Summers / Tree Swallow (Tachycineta bicolor) approaching nest box calling to its mate. Aurora, Colorado, USA.
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Charlie Summers / Tree Swallows (Tachycineta bicolor) in flight as one enters, and another leaves the nest box. Aurora, Colorado, USA.
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Charlie Summers / Tree Swallow (Tachycineta bicolor) male leaving the nest box as the female approaches to take over nest duties. Aurora, Colorado, USA.
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Charlie Summers / Tree Swallows (Tachycineta bicolor) in flight. Aurora, Colorado, USA.
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Steven Kazlowski / Green Aurora borealis over the Beaufort Sea, seen from the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011
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Steven Kazlowski / Green Aurora borealis over the Beaufort Sea, seen from the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011
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Chris Newbert / Beaded Sea Anemone (Heteractis aurora) tentacles, Indonesia
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Juan Carlos Munoz / Northern lights / Aurora borealis over snowy landscape, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis patterns partially obscured by clouds, Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis and clouds, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis over mountains, Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis above clouds over Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis above clouds over Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis over Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis above Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis over Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Jokulsarlon glacier lagoon at night with Northern lights / Aurora borealis and clouds in the sky, Southern Iceland, Iceland, Europe, March 2012
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Juan Carlos Munoz / Northern lights / Aurora borealis over mountains, Southern Iceland, Iceland, Europe, March 2012