Martin Dohrn / Group of lions (Panthera leo) at night, Masai Mara, Kenya. Photographed using 'Starlight Camera' technology without artificial lighting.

Nick Turner / Man lifting fluorescent light tubes at a recycling centre, Stroud, Gloucestershire, UK, February 2008.

Donald M. Jones / Common Loon (Gavia immer) stretching wings, Troy, Montana

Martin Dohrn / Hippo (Hippopotamus amphibius) in threat pose, Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial lighting.

Martin Dohrn / Lions (Panthera leo) approaching rhinoceros, Masai Mara, Kenya. Photographed at night using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Pride of lions (Panthera leo) in Masai Mara, Kenya. Photographed at night using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Lionesses (Panthera leo) killing zebra, Masai Mara, Kenya. Image taken at night using thermal Camera technology without artificial lighting. Can only be used if National Geographic "Night of the Lio...

Jack Dykinga / Silhouettte of Joshua tree (Yucca brevifolia) at sunset with lightning in background, Sonoran / Mojave transition zone, Joshua Forest Parkway, Arizona, USA

Kevin Schafer / Amazon River Dolphin (Inia geoffrensis) pair swimming in Ariau River, tributary of Rio Negro, Amazonia, Brazil

Vincent Grafhorst / Southern Giraffe (Giraffa giraffa) silhouetted against the setting sun, Lethiau Valley, Central Kalahari Game Reserve, Botswana

Konrad Wothe / Camargue Horse (Equus caballus) group running at sunset, Camargue, France

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) chicks, Riiser-Larsen Ice Shelf, Antarctica

Michio Hoshino / Grizzly Bear (Ursus arctos horribilis) shaking off water after a bath, Alaska

Richard Du Toit / Springbok (Antidorcas marsupialis) grazing under tree, Kalahari Gemsbok Park, South Africa

Jim Brandenburg / Gemsbok (Oryx gazella) running across sand dune, Namib Desert, Namibia

Mitsuaki Iwago / African Lion (Panthera leo) mother with cub at dawn, Serengeti National Park, Tanzania

Gerry Ellis / Whistling Thorn (Acacia drepanolobium) tree over savannah, Masai Mara National Reserve, Kenya

Mitsuaki Iwago / African Lion (Panthera leo) cubs playing, Serengeti National Park, Tanzania

Pete Oxford / Lighting strikes the Andes, Altiplano region, SW Bolivia, South America

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) cubs silhouetted against water at sunrise, Katmai National Park, Alaska

Tim Fitzharris / Sunrise over Granadier Range, Molas Pass, Weminuche Wilderness, Colorado

Tim Fitzharris / Bald Cypress (Taxodium distichum) grove in freshwater swamp at dawn, Lake Fausse Pointe, Louisiana

Tim Fitzharris / Black-tailed Jackrabbit (Lepus californicus) western North America

Norbert Wu / California Sea Lion (Zalophus californianus) playing in shallow water, Channel Islands, California

Jim Brandenburg / Inuits dog sledding in midnight sun, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / American Bison (Bison bison) herd grazing on prairie at sunset, South Dakota

Flip Nicklin / Giant Kelp (Macrocystis pyrifera) forest, Channel Islands National Park, California

Mitsuhiko Imamori / Christmas Tree Firefly (Pyrophanes appendiculata) group lighting up tree at night, southeast Asia

Jim Brandenburg / Arctic Wolf (Canis lupus) portrait, Ellesmere Island, Nunavut, Canada

Mitsuhiko Imamori / Honeypot Ant (Camponotus inflatus) repletes hanging from ceiling of larder, engorged with nectar they will regurgitate on demand to other workers, central Australia

Jim Brandenburg / Coniferous forest backlit at dawn, Minnesota

Michio Hoshino / Grizzly Bear (Ursus arctos horribilis) mother and cubs in autumn grass, Alaska

Jim Brandenburg / Arctic Wolf (Canis lupus) trio at sunset, Ellesmere Island, Nunavut, Canada

Michio Hoshino / Caribou (Rangifer tarandus) group crossing through river during migration, Alaska

Michio Hoshino / Polar Bear (Ursus maritimus) mother and two cubs, Churchill, Manitoba, Canada

Mark Moffett / Carpenter Ant (Camponotus schmtzi) on tendril of host Pitcher Plant (Nepenthes bicalcarata), Borneo, Malaysia

Mitsuhiko Imamori / Honeypot Ant (Camponotus inflatus) repletes hanging from ceiling of larder, engorged with nectar they will regurgitate on demand to other workers, central Australia

Martin Dohrn / Maasai herdsman with his cattle. Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Spotted hyaenas {Crocuta crocuta} on the prowl. Serengeti NP, Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaenas harrass lioness. Serengeti NP, Tanzania, East Africa. Infra-red image taken at night using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaena portrait in moonlight {Crocuta crocuta} Serengeti NP Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaenas {Crocuta crocuta} feeding on kill, Serengeti NP, Tanzania, East Africa. Image taken at night using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Ar...

Martin Dohrn / Lioness killing Zebra, Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken at night using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Lioness head portrait in moonlight Serengeti NP, Tanzania, East Africa. Note dilated pupils. Image taken using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Moonlit night-time landscape of kopje Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Night-time in the Serengeti NP, Ngorongoro Conservation Area, Tanzania, East Africa. Image taken using 'Starlight Camera' technology with no artificial lighting.

Richard Du Toit / Vervet Monkey (Chlorocebus aethiops) jumping, Limpopo, South Africa

Richard Du Toit / African Darter (Anhinga rufa), Rietvlei Nature Reserve, Gauteng, South Africa

Tim Fitzharris / Seastacks silhouetted at sunset, Ruby Beach, Olympic National Park, Washington

Albert Lleal / Brazilian Waterweed (Egeria densa) leaf showing chloroplasts and cell walls

Albert Lleal / Soft Hornwort (Ceratophyllum submersum) leaf showing chloroplasts and cell walls

Ingo Arndt / Reticulated Glass Frog (Hyalinobatrachium valerioi) male camouflaged on leaf guarding egg clutch, Costa Rica

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) male at sunrise, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly Bear (Ursus arctos horribilis) male at sunrise, Lake Clark National Park, Alaska

Mark MacEwen / Marsh pride lioness at night lion (Panthera leo) at night, Masai Mara, Kenya, taken with infra-red camera, September

Jim Brandenburg / Merganser (Mergus sp) duck female and chicks in the rain, Olivia Pond, North America

Jim Brandenburg / Mont Saint-Michel and row of trees, Normandy, France

Tom Vezo / Mittens at sunrise, Monument Valley Navajo Tribal Park, Arizona

Jim Brandenburg / Tombelaine Island, Normandy, France

Jim Brandenburg / Standing stones at sunrise, Carnac, Brittany, France

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

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

Tui De Roy / Grant's Gazelle (Nanger granti) male, Ol Pejeta Conservancy, Kenya

Tui De Roy / Grant's Gazelle (Nanger granti) herd at sunset, Ol Pejeta Conservancy, Kenya

Tui De Roy / Cheetah (Acinonyx jubatus) in grassland, Ol Pejeta Conservancy, Kenya

Tom Vezo / Great Egret (Ardea alba) displaying during courtship in breeding plumage, Florida

Richard Herrmann / Giant Kelp (Macrocystis pyrifera) blades floating at surface, Cortez Bank, California

Hiroya Minakuchi / Sunrise over rainforest, Malaysia

Hiroya Minakuchi / Ant (Crematogaster sp), Malaysia

Hiroya Minakuchi / Leaves with holes, Danum Valley, Malaysia

Konrad Wothe / Emperor Penguin (Aptenodytes forsteri) adult pair with chicks walking at sunset, Weddell Sea, Antarctica

Sebastian Kennerknecht / Dromedary (Camelus dromedarius) camel silhouetted on beach at sunrise, Hawf Protected Area, Yemen

Konrad Wothe / Baobab (Adansonia digitata) tree at sunset, Ruaha National Park, Tanzania

Konrad Wothe / Thunderstorm over Lake Tanganyika, Mahale Mountains National Park, Tanzania

Konrad Wothe / Snail (Zonitidae) on dew covered grass, Bavaria, Germany

Nick Turner / Close up of fluorescent light tubes in a plastic container at a recycling centre, Gloucestershire, UK, February 2008.

Nick Turner / Light bulb recycling information sign at a recycling centre, Stroud, Gloucestershire, UK.

Nick Turner / Close up of fluorescent light tubes at a recycling centre, Stroud, Gloucestershire, UK, February 2008.

Nick Turner / Close up of fluorescent light tubes at a recycling centre, Stroud, Gloucestershire, UK, February 2008.

Nick Turner / Fluorescent light tube recycling at a recycling centre, Gloucestershire, UK.

Nick Turner / Fluorescent light tube recycling at a recycling centre, Stroud, Gloucestershire, UK, February 2008.

Nick Turner / Fluorescent light tube recycling at a recycling centre, Stroud, Gloucestershire, UK, February 2008.

Nick Turner / Close up of fluorescent light tubes being recycled at a recycling centre, Stroud, Gloucestershire, UK, February 2008.

Alex Mustard / Secretary blenny (Acanthemblemaria maria) living in a tube within Boulder brain coral (Colpophyllia natans). Photo illuminated with a single flash, with restricted beam to create hard lighting. East E...

Piotr Naskrecki / Morning fog over rainforest, New Britain, Papua New Guinea

Laurie Campbell / Red deer (Cervus elaphus) hind / female in evening lighting, Inverness-shire, Scotland, October

Donald M. Jones / Elk (Cervus elaphus) bull breathing, National Bison Range, Moise, Montana

Donald M. Jones / Common Loon (Gavia immer) taking flight, Troy, Montana

Hiroya Minakuchi / Japanese Maple (Acer palmatum) leaves in fall colors, Kyoto, Japan

Hiroya Minakuchi / Japanese Maple (Acer palmatum) leaves in fall colors, Kyoto, Japan

Chien Lee / Firefly (Lampyridae) group lighting up at night, Halmahera Island, North Maluku, Indonesia

Chien Lee / Firefly (Lampyridae) group lighting up at night, Halmahera Island, North Maluku, Indonesia

Jim Brandenburg / Blazing Star (Liatris pycnostachya) flowers in prairie, Aldo Leopold Memorial Preserve, Wisconsin

MYN / John Tiddy / Field studio set up for photographing Tall greenhood orchid (Pterostylis melagramma) for the Meet your neighbours project, Victoria, Australia, June, 2011. meetyourneighbours.net project

Theo Allofs / Hippopotamus (Hippopotamus amphibius) running in water, Moremi Game Reserve, Okavango Delta, Botswana

Sven Zacek / Red sunset lighting rainfall in front of waves. Hiiumaa Island, Estonia, Europe, August 2011.