Jack Dykinga / Scalding hot water continuously spouting behind layers of mineral deposits, Fly Geyser, Black Rock Desert, Great Basin Desert, Nevada, USA

Sergey Gorshkov / Ash plume and lava erupting from Plosky Tolbachik Volcano, Kamchatka Peninsula, Russia, 5 December 2012

Graham Eaton / Underwater landscape within a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / View looking up a waterfall from within a stream, Snowdonia NP, Gwynedd Wales, UK, December

Graham Eaton / Underwater view of a rapidly flowing mountain stream, Snowdonia NP, Gwynedd, Wales, UK, November

Graham Eaton / A split-level view through a small waterfall, Llanberis, Snowdonia NP, Gwynedd, Wales, UK, July

Graham Eaton / Underwater view of River Glaslyn rapids, Snowdonia NP, Gwynedd, Wales, UK, April

Brent Stephenson / Waves crashing on a massive iceberg. Drake Passage, near the South Shetland Islands, Antarctica, January.

Brent Stephenson / A rough and windy day in the Drake Passage with Force 9+ beaufort scale conditions. Drake Passage, South Atlantic, January.

Michael Hutchinson / Rainbow in spray of Seljalandsfoss waterfall, Iceland

Loic Poidevin / Eruption and molten lava flowing down the sides of the Erta ale volcano (the smoking mountain) in the Afar desert, Northern Ethiopia, February 2009

Ross Hoddinott / 2020VISION / Close-up of group of toadstools (Mycena sp) autumn. Leicestershire, UK. November. Photographer quote: 'It is all too easy to overlook the fascinating miniture world underneath our feet - mosses,...

Inaki Relanzon / Volcanic eruption, Eyjafjallajokull, near the Myrdalsjokull glacier, South Iceland, april 2010.

Alex Hyde / The Fairy Pools, on the Allt Coir' a' Mhadaidh river running down from the Cullin Hills, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK, February 2010.

Orsolya Haarberg / Volcanic ash and lava eruption from the volcano under the Eyjafjallajokull ice cap, steam rises as the flowing lava interacts with glacier ice, Iceland, May 2010

Floris van Breugel / View from behind one of the many waterfalls in Watkins Glen, upstate New York's fingerlakes region. New York, USA. May 2008

Guy Edwardes / Two people silhouetted in front of Skogafoss waterfall in southern Iceland, June 2009

Guy Edwardes / Svartifoss / Black Falls, Skaftafell National Park Iceland, July 2009

Edwin Giesbers / Map lichen (Rhizocarpon geographicum) on rock with (Hyoseris radiata) flower, Menorca, Balearic Islands, Spain, Europe

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

Stephen Dalton / Bluebell (Hyacinthoides non-scripta) shoot growing through decomposed leaf, UK

Benoit Stichelbaut / Waves crashing around Ar-Men Lighthouse (37 metres) in the Sein channel, Finistre, Brittany, France. December 2007.

Philip Dalton / Waterspout over Lake Victoria, Uganda

Philip Dalton / Waterspout over Lake Victoria, Uganda

Inaki Relanzon / Beech (Fagus sylvatica) leaves overhanging Bellos River in Aisclo Canyon, Ordesa National Park, Pyrenees, Aragon, Spain. October 2009

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, hot lava flowing down into the Thorsmork valley, Iceland, 24/03/2010. Volcano dormant since 1821.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, hot lava flowing down into the Thorsmork valley, Iceland, 24/03/2010. Volcano dormant since 1821.

Juan Carlos Munoz / Eyjafjallajkull volcano erupting, Fimmvruhls area, Iceland, 7th of April 2010

Juan Carlos Munoz / Eyjafjallajkull volcano erupting, Fimmvruhls area, Iceland, 7th of April 2010

Juan Carlos Munoz / Eyjafjallajkull volcano erupting, Fimmvruhls area, Iceland, 5th of April 2010

Andy Rouse / Aerial view of Peters Glacier, King Haakon Bay, South Georgia, Antarctica, December 2006

Solvin Zankl / Close to the city of Swakopmund a sand dune is on the move. The landscape of the Namib Dunes is formed by the powerful force of desert winds. These winds gradually push the dunes in a north-westerly d...

Mark Moffett / Tokay Gecko (Gecko gecko) foot pads showing scales which enable it to climb vertical surfaces by using an intermolecular force called Van der Walls force, southeast Asia

Mark Moffett / Tokay Gecko (Gecko gecko) foot pads showing scales which enable it to climb vertical surfaces by using an intermolecular force called Van der Walls force, southeast Asia

Pete Cairns / River flowing around rock, Scotland, UK

Floris van Breugel / Palouse Falls seen under high spring flow with rainbow, Washington, USA. April

John Waters / Peregrine falcon (Falco peregrinus) trained bird, adult male, in flight carrying a data logger on its back to provide information on flight speed, angle and G force, Somerset, UK. September 2011

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / Oil rig "Northern Producer" in a force 9 gale. North Sea, March 2009.

Philip Stephen / Oil rig "Northern Producer" in a force 9 gale. North Sea, March 2009.

Philip Stephen / Oil rig "Northern Producer" in a force 9 gale. North Sea, March 2009.

Philip Stephen / MFV trawler "Harvester" in storm force winds and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Graham Eaton / An underwater view of a mountain stream, showing water turbulence, Snowdonia NP, Gwynedd, Wales, UK, December

Ben Hall / 2020VISION / Water cascading down Scale Force waterfall in autumn, Lake District NP, Cumbria, England, UK, November

Ben Hall / 2020VISION / Water cascading down Scale Force waterfall in autumn, Lake District NP, Cumbria, England, UK, November

Ben Hall / 2020VISION / Water cascading down Scale Force waterfall in autumn, Lake District NP, Cumbria, England, UK, November

Ben Hall / 2020VISION / Water cascading down Scale Force waterfall in autumn, Lake District NP, Cumbria, England, UK, November

Ben Hall / 2020VISION / Water cascading down Scale Force waterfall in autumn, Lake District NP, Cumbria, England, UK, November

Ben Hall / 2020VISION / Water cascading down Scale Force waterfall in autumn, Lake District NP, Cumbria, England, UK, November

Aflo / Y-11806 View from Space of eye of Hurricane above Earth

Aflo / N-13905 River flowing through woodland, France.

Aflo / N-15402 Flowing water abstract.

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-10701 Forked lightning racing across sky at night

Aflo / N-12804 Waterfall abstract, Iwate, Japan.

Aflo / N-16301 Waterfall abstract, Hokkaido, Japan.

Aflo / N-16304 Waterfall crashing though rocks, Switzerland.

Aflo / N-14701 Waterfall abstract, Iwate, Japan.

Aflo / N-14703 Waterfall abstract, Fukushima, Japan.

Aflo / N-16303 Water flowing fast over stones in river.

Aflo / N-13903 River with rapids flowing through woodland, Gumma, Japan.

David Woodfall / Influx of salt water into shrimp ponds at high tide, benefits Shrimp farming but threatens the supply of drinking water by causing salination, Ganges delta, Bangladesh, November 2008

David Woodfall / Influx of salt water into shrimp ponds at high tide, benefits Shrimp farming but threatens the supply of drinking water by causing salination, Ganges delta, Bangladesh, November 2008

Jeff Rotman / Drug sniffing dog, trained by Pakistan's Anti-Narcotics Force, searches inside a truck. Dogs are used frequently to search cars and luggage at the airport. Rawlpindi, Pakistan.

Philip Stephen / MFV trawler "Harvester" on the crest of a wave in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Philip Stephen / MFV trawler "Harvester" in storm force gales and heavy seas, 70 miles east of the Shetlands. Winds gusting to 83 Knots. January 2009. Property Released.

Solvin Zankl / Close to the city of Swakopmund a sand dune is on the move. The landscape of the Namib Dunes is formed by the powerful force of desert winds. These winds gradually push the dunes in a north-westerly d...

Ian McCarthy / View from behind the waterfall of a curtain of water falling, Thornton Force, Yorkshire, UK

David Hall / Mantis shrimp {Odontodactylus scyllarus} Papua New Guinea. Mantis shrimp use their front legs to break the shells of their prey with a force 8,000 times that of gravity. If a human boxer had the same...

RHONDA KLEVANSKY / Dust devil spinning across dry Salar Pujsa, Atacama Desert, Chile

Michael Hutchinson / Dungeon ghyll force waterfall, Cumbria, UK.

Constantinos Petrinos / Smasher Mantis shrimp {Odontodacyylus latirostris} Sulawesi Indonesia. Indo Pacific. This shrimp has a punch 8,000 times faster than gravity. An equivalent human punch would have a force equal to that...

Gerry Ellis / Tokay Gecko (Gecko gecko) foot pads showing scales which enable it to climb vertical surfaces by using an intermolecular force called Van der Walls force, southeast Asia

Pete Cairns / Line of beaters on grouse moor force birds into the air. Cairngorms NP, Scotland, UK

Richard Du Toit / Augrabies Falls on Orange River in winter in full flow, NP, South Africa

Jason Smalley / Hardraw Force waterfall, Hawes, Wensleydale, Yorkshire, UK, - England's tallest waterfall.

Neil Bromhall / Earthstar ejecting spores {Geastrum sp} UK - spores ejected by the force of raindrops

Neil Bromhall / Earthstar ejecting spores {Geastrum sp} UK spores ejected by the force of raindrops

Paul D Stewart / Woodcut illustration of Wolverine (Gulo gulo) or Glutton, squeezing between trees to defecate before resuming feeding. From Conrad Gesner's 'Icones Animalium' published by Christof Froschover, Zurich,...

Philip Stephen / M.F.V. "Ocean Pioneer" fishing for Prawns in a force 8 gale on the North Sea. February 2005.

Onne van der Wal / Hurricane force winds blowing over ocean waves.