Sandra Bartocha / Dark clouds above the North Sea, Norderney, Germany, September

Sandra Bartocha / Dark clouds, Mecklenburg-Strelitz, Mecklenburg-Vorpommern, Germany, June

Ross Hoddinott / Hartland Quay, rugged north Devon coastline, high tide at sunset, Devon, UK, April 2012.

Graham Eaton / View towards Arenig Fach over open moorland, with stormy sky and dark clouds. Snowdonia NP, Gwynedd, Wales, UK, October

Brent Stephenson / A cruise ship heads back up the Beagle Channel towards Ushuaia at the end of an Antarctic cruise. Beagle Channel, Tierra del Fuego Archipelago, South America, December.

Sven Zacek / Waves washing up a beach under dark clouds. Hiiumaa Island, Estonia, Europe, August 2011.

Sven Zacek / Waves crashing onto beach rock under dark clouds. Hiiumaa Island, Estonia, Europe, August 2011.

Bence Mate / Confrontation between a great egret (Ardea alba) and grey heron (Ardea cinerea), Lake Csaj, Kiskunsagi National Park, Hungary.

Ben Hall / 2020VISION / Sun's rays shining through dark clouds, Ballynahone Bog, County Antrim, Northern Ireland, UK, June 2011

Inaki Relanzon / Dramatic light on Benijo Beach. Anaga Peninsula, Tenerife, Canary Islands, February 2011.

Juergen Freund / Lightning storm over the Australian outback at dusk. Queensland, Australia, February 2008

Peter Cairns / 2020VISION / Giants Causeway at dusk, County Antrim, Northern Ireland, UK, June 2010. Looking out to sea. 2020VISION Book Plate.

Alex Hyde / Low winter sun shining through freezing fog, Bonsall Moor, Peak District National Park, Derbyshire, UK, December 2009.

Mary McDonald / Flock of Cattle Egrets (Bubulcus ibis) in roosting trees at dusk, Imba Ndutu, Serengeti NP, Tanzania, East Africa.

Aflo / Y-10805 Forked lightning racing across sky at night

David Woodfall / Dark monsoon rain clouds over the Pasur river, Ganges delta, Bangladesh, November 2008

Sven Zacek / Reflections and dark rain clouds over wetland pools, Estonia

Wild Wonders of Europe / Hamblin / Cow parsely (Anthriscus sylvetris) in damp meadow, Lithuania, June 2009

Wild Wonders of Europe / Hamblin / Sand dunes on Agilos Kopa, Nagliai Nature Reserve, Curonian Spit, Lithuania, June 2009. WWE BOOK. WWE INDOOR EXHIBITION

Ross Hoddinott / Widemouth bay beach and coastline at low tide with dark clouds, north Cornwall, UK. May 2009.

Wild Wonders of Europe / López / Dark cloudy sky over Lake Usma viewed from Moricsala Island, Moricsala Strict Nature Reserve, Latvia, June 2009

Wild Wonders of Europe / López / Lake Usma viewed from a mooring stage on Moricsala Island with dark clouds, Moricsala Strict Nature Reserve, Latvia, June 2009 UNAVAILABLE FOR COMMERCIAL USE WITHOUT PRIOR CONSENT

Andy Rouse / Iceberg and broken pack ice, dark clouds overhead, Svalbard, Norway, August 2007

Wild Wonders of Europe / Munier / Photographer, Vincent Munier, walking with rucksack through snow covered landscape with sun shining through storm sky, Forollhogna National Park, Norway. On location for Wild Wonders of Europe, Septem...

Wild Wonders of Europe / Munier / Three Reindeer (Rangifer tarandus) silhouetted against dark cloudy sky, Forollhogna National Park, Norway, September 2008

Ross Hoddinott / Brentor Church with storm clouds behind, evening view, Dartmoor NP, Devon, UK. October 2008.

Ross Hoddinott / Silhouette of weathered, windswept hawthorn tree on stormy morning sky, Near Lynton, Devon, UK. October 2008.

Ross Hoddinott / Heather and moorland view, near Birch tor, Dartmoor NP, Devon, UK, August 2008

Jose B. Ruiz / Cultivated fields with dark storm clouds, Dos Hermanas, Seville, Spain

Anup Shah / Wildebeest migration on savanna {Connochaetes taurinus} Masai Mara NR Kenya East Africa

Kirkendall-Spring / The Coquille River Lighthouse in Bullards Beach State Park, with dark clouds, Bandon, Oregon, USA, June 2012

Ernie Janes / Stormy afternoon at Walcott, Norfolk, October

Ann & Steve Toon / Wildebeest (Connochaetes taurinus) on migration under dark skies, Masai Mara game reserve, Kenya, September 2012

Wild Wonders of Europe / Widstrand / Storm clouds over the reed beds (Phragmites communis) Danube delta rewilding area, Romania, May

David Noton / The Church of St. Michael de Rupe under dark skies, Brentnor, Devon, UK June 2012

Wild Wonders of Europe / Bartocha / Stormy clouds over alpine grasslands and view of tree line, Leota mountain range, Arges county, Carpathian Mountains, Romania, July, 2011

Wild Wonders of Europe / Bartocha / Dark clouds over alpine grassland, Leota mountain range, Arges County, Carpathian Mountains, Romania, July

Wild Wonders of Europe / Bartocha / Grassland in alpine area with dark clouds, Leota mountain range, Arges county, Carpathian Mountains, Romania, July, 2011

Mark Carwardine / American bald eagle (Haliaeetus leucocephalus) flying in front of dark storm clouds, Prince Rupert, British Columbia, Canada

Sandra Bartocha / Rock in Baltic Sea surrounded by water at dusk with stormy clouds, Kreptitz, Mecklenburg-Vorpommern, Germany, August

Mark Hamblin / 2020VISION / Pebbles on beach. Talisker Bay, Isle of Skye, Scotland, UK, October 2011.

Mark Hamblin / 2020VISION / Pebbles on black sand beach. Talisker Bay, Isle of Skye, Scotland, UK, October 2011.

Mark Hamblin / 2020VISION / Seaweed and pebbles on black sand beach. Talisker Bay, Isle of Skye, Scotland, UK, October 2011.

Mark Hamblin / 2020VISION / Rocky coastline near Elgol with view to Cuillins, Isle of Skye, Scotland, UK, October 2011.

Peter Cairns / 2020VISION / Clouds over Loch Laggan at sunset. Central Scotland, October 2011.

Peter Cairns / 2020VISION / Clouds over Loch Laggan at sunset. Central Scotland, October 2011.

Peter Cairns / 2020VISION / Clouds over Loch Laggan at sunset. Central Scotland, October 2011.

Brent Stephenson / Looking up Bowen Channel with heavy cloud and moody lighting in the morning, with mountains covered in native forest, Dusky Sound, Fiordland, South Island, New Zealand

Konstantin Mikhailov / Russian winter in Altai Mountains, gorge valley of the river Kucherla, famous for its milky blue-and-green waters with riparian dark forest of Siberian spruce (Picea obovata) Siberian fir (Abies sibir...

Ross Hoddinott / Scenic view of Porth Nanven beqach at low tide, in evening light with dark storm clouds, The Cot Valley, Cape Cornwall, West Cornwall, UK, September 2011.

Ross Hoddinott / View of Southerndown with dark storm clouds overhead, Glamorgan Heritage Coast, near Bridgend, Wales, UK, December 2012.

Erlend Haarberg / Coastal cliffs of Dyrholaey on a dark day, Iceland, February 2011

Orsolya Haarberg / Mountain surrounded by dark clouds, Gran Paradiso National Park, Italy, November 2008

Nick Turner / Two cyclists on The Tarka Trail cycle path on a dark cloudy day, Devon, UK, March 2010.

Ben Hall / 2020VISION / View from the summit of Haystacks towards High Crag, Lake District NP, Cumbria, England, UK, November, with storm sky dark clouds

Sven Zacek / Dark skies over the sunlit 'sacred lake' Puhajarv. Estonia, Europe, October 2010.

Peter Cairns / 2020VISION / Dramatic skies off Neist Point, Isle of Skye, Inner Hebrides, Scotland, UK, June 2011

Terry Whittaker / 2020VISION / Wicken Fen under dark clouds landscape, Cambridgeshire, UK, June 2011

Graham Eaton / Icy Road to 'Worlds End', Esclusham Mountain, in overcast winter weather. Wrexham, Wales, December 2010.

Ben Hall / 2020VISION / Sun's rays shining through dark clouds, Ballynahone Bog, County Antrim, Northern Ireland, UK, June 2011

Ben Hall / 2020VISION / Sun's rays shining through dark clouds, Ballynahone Bog, County Antrim, Northern Ireland, UK, June 2011

Bryan and Cherry Alexander / Dark clouds above the Bolshaia Paipudyna Valley in the Polar Ural Mountains. Yamal, Western Siberia, Russia, Summer 2007.

Bryan and Cherry Alexander / Dark clouds above a Khanty reindeer herder's tent in the Polar Ural Mountains. Yamal, Western Siberia, Russia, Summer 2007.

Bryan and Cherry Alexander / Dark clouds gather behind a reindeer herder's tent as a Khanty woman hangs up her washing to dry at a camp in the Polar Ural Mountains. Yamal, Western Siberia, Russia, Summer 2007

Bryan and Cherry Alexander / Dark clouds above a Khanty reindeer herder's tent in the Polar Ural Mountains, Yamal, Western Siberia, Russia, Summer 2007.

Yva Momatiuk & John Eastcott / Tall prairie grasses and dark clouds, Malheur National Wildlife Refuge, eastern Oregon

Yva Momatiuk & John Eastcott / Tall prairie grasses and dark clouds, Malheur National Wildlife Refuge, eastern Oregon

Juergen Freund / Tubbataha Reef ranger station in a storm with a full arch rainbow against the dark clouds. Tubbataha Reef National Marine Park, Palawan, Philippines, April 2009.

Inaki Relanzon / Dramatic light on Benijo Beach. Anaga Peninsula, Tenerife, Canary Islands, , February 2011.

Peter Cairns / 2020VISION / Giants Causeway at dusk, County Antrim, Northern Ireland, UK, June 2010. Looking out to sea

Peter Cairns / 2020VISION / Giants Causeway at dusk, County Antrim, Northern Ireland, UK, June 2010. Looking out to sea

Peter Cairns / 2020VISION / Dark clouds scudding over winter sun, Cairngorms National Park, Scotland, UK, March 2010

Bruno D'Amicis / Clouds rising from Spruce (Picea sp.) forest. Western Tatras, Slovakia, June.

Bruno D'Amicis / Clouds above Spruce (Picea abies) forest at dusk. Western Tatras, Slovakia, June 2008.

Bruno D'Amicis / Clouds above mountain forest. Western Tatras, Slovakia, June 2009.

Angelo Gandolfi / Figari bay and medieval watchtower, with dark storm clouds, Southern coast of Corsica island, Bonifacio, France, Febraury 2010

Bryan and Cherry Alexander / Dark clouds above a Komy herders' camp before Spring snow storm. Yamal, Western Siberia, Russia, 2003.

Guy Edwardes / Wildflowers in bloom, with brightly painted yellow Selvogsviti Lighthouse under dark storm clouds, Reykjanes, Iceland, July 2009.

Guy Edwardes / Wildflowers in bloom, with brightly painted yellow Selvogsviti Lighthouse under dark storm clouds, Reykjanes, Iceland, July 2009.

Yva Momatiuk & John Eastcott / Dark cumulus clouds hanging over fields in summer, Wyoming

Jouan & Rius / Storm clouds over Peaceful Bay, South west, Western Australia. August 2009

Aflo / Y-8804 Sun setting behind dark clouds in evening

Aflo / Y-7704 Sun shining from behind dark clouds in evening

Aflo / Y-7703 Sun setting behind dark clouds

Aflo / Y-780 Cloud formations in evening sky

Aflo / Y-11501 Full moon rising

Aflo / Y-10601 Northern lights / Aurora borealis over forest

Aflo / Y-10803 Forked lightning above city at night

Aflo / Y-10804 Forked lightning above city lights at night

Aflo / Y-10802 Forked lightning racing across sky at night

Aflo / Y-10801 Forked lightning racing across sky at night

Aflo / Y-10905 Forked lightning on horizon above sea in storm

Aflo / Y-11002 Rainbow over tundra landscape, Alaska, USA

Aflo / Y-10401 Rainbow on horizon over sea with dark clouds above

Tim Laman / Sunlight on fringing forest with dark clouds behind, Anaho Bay, Nuku Hiva Island, Marquesas Islands, French Polynesia, July 2006