Tim Fitzharris / Lightning strike near rock formation, Church Rock, Red Rock State Park, New Mexico
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Vincent Grafhorst / Thunder storm with lightning bolts at sunset over Kalahari, Khutse Game Reserve, Botswana
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Aflo / Y-10805 Forked lightning racing across sky at night
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Jim Brandenburg / Prairie under threatening thunder clouds, South Dakota
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Gerry Ellis / Altocumulus thunder head dumping rain on pan, Amboseli National Park, Kenya
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Ashley Cooper / Water spout caused by a severe thunder storm over Sivota, Greece. June 2014
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Ashley Cooper / Water spout caused by a severe thunder storm over Sivota, Greece. June 2014
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Ashley Cooper / Thunder storm passing over the Langdale Pikes, Lake District, England, UK. May 2012
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Ashley Cooper / Thunder storm passing over the Langdale Pikes, Lake District, England, UK. May 2012
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Richard Du Toit / Lightning over savanna, Mountain Zebra National Park, South Africa
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Greg Basco/ BIA / Thunderstorm along coast, Santa Rosa National Park, Costa Rica
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Daniel J. Cox / Lightning storm in summer, Mission Valley, Montana
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Ingo Arndt / Lightning strikes over steppe, eastern Mongolia
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Ingo Arndt / Lightning strikes over steppe, eastern Mongolia
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Ingo Arndt / Lightning strike over steppe, eastern Mongolia
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Ingo Arndt / Lightning strikes over steppe, eastern Mongolia
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Benjamin Olson / Lightning strike over prairie, Badlands National Park, South Dakota
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Benjamin Olson / Storm over prairie, Badlands National Park, South Dakota
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Tim Fitzharris / Thunderstorm over deciduous forest at sunset, Santa Fe National Forest, New Mexico
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Tim Fitzharris / Lightning over deciduous forest at sunset, Santa Fe National Forest, New Mexico
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Tim Fitzharris / Saguaro (Carnegiea gigantea) cacti with lightning over peak in desert, Picacho Peak State Park, Arizona
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Tim Fitzharris / Lightning strikes near rock formation, Church Rock, Red Rock State Park, New Mexico
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Wim van den Heever / Thunder storm with lightning over the Okavango Delta swamp, Botswana
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Richard Du Toit / Thunder storm with lightning strike, South Africa
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Ernie Janes / Cley Mill and marshes in thunder storm, Norfolk, May 2013
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Richard Du Toit / Thunder storm and lightning, Kgalagadi Transfrontier Park, South Africa
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Konrad Wothe / Thunderstorm over Lake Tanganyika, Mahale Mountains National Park, Tanzania
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Nick Garbutt / Severe thunder storm and clouds developing over lowland rainforest in the centre of Maliau Basin. Sabah's 'Lost World', Borneo.
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Richard Du Toit / Lightning during summer storm, Kalahari, Northern Cape, South Africa
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Vincent Grafhorst / Thunder storm with lightning bolts over Kalahari, Khutse Game Reserve, Botswana
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Vincent Grafhorst / Thunder storm with lightning bolts over Kalahari, Khutse Game Reserve, Botswana
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Yva Momatiuk & John Eastcott / Mustang (Equus caballus) group on canyon rim in summer with thunder clouds forming overhead, Montana
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Aflo / Y-10803 Forked lightning above city at night
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Aflo / Y-10804 Forked lightning above city lights at night
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Aflo / Y-10802 Forked lightning racing across sky at night
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Aflo / Y-10801 Forked lightning racing across sky at night
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Aflo / Y-10905 Forked lightning on horizon above sea in storm
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Aflo / Y-10701 Forked lightning racing across sky at night
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Wild Wonders of Europe / Maitland / Thunder storm over the Galicica mountain range, Galicica National Park, Macedonia, June 2009
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Hanne & Jens Eriksen / Children from the high plateaus of Kyrgyzstan with a thunder storm brewing in the background, Kyrgyzstan, central Asia, July 2003
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Richard Du Toit / Thundestorm, Nossob River, summer, Kalahari Gemsbok National Park, South Africa
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Tim Fitzharris / Thunderstorm with lightning strike over Curecanti National Recreational Area, Colorado
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Jim Brandenburg / American Black Duck (Anas rubripes) group on lake in thunder storm, Northwoods, Minnesota
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Tim Fitzharris / Thunderstorm cloud at sunset, North America
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Benjamin Olson / Lightning strikes over badlands, Badlands National Park, South Dakota
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Benjamin Olson / Storm over badlands, Badlands National Park, South Dakota
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Benjamin Olson / Lightning strikes over prairie, Badlands National Park, South Dakota
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Hiroya Minakuchi / Lightning during thunderstorm, Canyonlands National Park, Utah
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Duncan Usher / Thunder clouds at twilight, Germany
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Duncan Usher / Rainbow and thunderstorm near Tower Fall, Yellowstone National Park, Wyoming
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Tom Vezo / Lightning strike, Santa Rita Mountains, Arizona
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Richard Du Toit / African Elephant (Loxodonta africana) bull with thunderstorm in the background, Moremi Game Reserve, Botswana
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Shin Yoshino / Kalahari thunder storm, Botswana
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Jim Brandenburg / Thunderstorm, Northwoods, Minnesota