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    • Thermal
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Herd of giraffes (Giraffa camelopardalis) resting at night, Masai Mara, Kenya. Image taken at night using thermal camera technology, with no artificial light. - Martin Dohrn
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Martin Dohrn / Herd of giraffes (Giraffa camelopardalis) resting at night, Masai Mara, Kenya. Image taken at night using thermal camera technology, with no artificial light.
Sunflower next to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. May 2011 - Ashley Cooper
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Ashley Cooper / Sunflower next to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. May 2011
Heliostats, large reflective mirrors directing sunlight to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. June 2011 - Ashley Cooper
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Ashley Cooper / Heliostats, large reflective mirrors directing sunlight to the PS20 solar thermal tower, the only such working solar tower currently in the world. Sanlucar La Mayor, Andalucia, Spain. June 2011
Sun rays reflected onto solar tower at Ivanpah Solar Thermal Power Plant,  the largest solar thermal plant in the world. It covers 4,000 acres of desert and produce 392 megawatts (MW) of electricity.... - Ashley Cooper
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Ashley Cooper / Sun rays reflected onto solar tower at Ivanpah Solar Thermal Power Plant, the largest solar thermal plant in the world. It covers 4,000 acres of desert and produce 392 megawatts (MW) of electricity....
Ephydrid flies (Ephydra sp) that eat microscopic algae and survives during the winter in thermal pools. Biscut Basin, Yellowstone National Park, Wyoming, USA, January. - Jeff Vanuga
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Jeff Vanuga / Ephydrid flies (Ephydra sp) that eat microscopic algae and survives during the winter in thermal pools. Biscut Basin, Yellowstone National Park, Wyoming, USA, January.
Old Faithful Geyser erupting at -30 Celsius in winter.  Upper Geyser Basin, Yellowstone National Park, Wyoming, USA, January 2015. - Jeff Vanuga
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Jeff Vanuga / Old Faithful Geyser erupting at -30 Celsius in winter. Upper Geyser Basin, Yellowstone National Park, Wyoming, USA, January 2015.
Dallol hot spring with salt concretions coloured by sulphur, potassium and iron, Dallol Volcano, Danakil Depression, Ethiopia, March 2015. - Eric Baccega
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Eric Baccega / Dallol hot spring with salt concretions coloured by sulphur, potassium and iron, Dallol Volcano, Danakil Depression, Ethiopia, March 2015.
Dallol hot spring with salt concretions coloured by sulphur, potassium and iron, Dallol Volcano, Danakil Depression, Ethiopia, March 2015. - Eric Baccega
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Eric Baccega / Dallol hot spring with salt concretions coloured by sulphur, potassium and iron, Dallol Volcano, Danakil Depression, Ethiopia, March 2015.
Dallol hot spring with salt concretions coloured by sulphur, potassium and iron, Dallol Volcano, Danakil Depression, Ethiopia, March 2015. - Eric Baccega
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Eric Baccega / Dallol hot spring with salt concretions coloured by sulphur, potassium and iron, Dallol Volcano, Danakil Depression, Ethiopia, March 2015.
A hot spring in the West Thumb Geyser Basin, Yellowstone National Park, Wyoming. The colors are a result of thermophilic bacteria living in the hot springs. December 2010. - Floris  van Breugel
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Floris van Breugel / A hot spring in the West Thumb Geyser Basin, Yellowstone National Park, Wyoming. The colors are a result of thermophilic bacteria living in the hot springs. December 2010.
Japanese macaque (Macaca fuscata) relaxing in hot spring in Jigokudani, Yaenkoen, Nagano, Japan, February. - Mark  MacEwen
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Mark MacEwen / Japanese macaque (Macaca fuscata) relaxing in hot spring in Jigokudani, Yaenkoen, Nagano, Japan, February.
Japanese Macaque (Macaca fuscata) baby sitting on the edge of thermal hotspring pool. Jigokudani Yean-Koen National Park, Japan, February. - Anup Shah
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Anup Shah / Japanese Macaque (Macaca fuscata) baby sitting on the edge of thermal hotspring pool. Jigokudani Yean-Koen National Park, Japan, February.
Burned trees in front of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011. - Ingo Arndt
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Ingo Arndt / Burned trees in front of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011. - Ingo Arndt
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Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.
Japanese Macaques (Macaca fuscata) enjoy time soaking and grooming in the hot spring in Jigokudani, Japan. - Diane  McAllister
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Diane McAllister / Japanese Macaques (Macaca fuscata) enjoy time soaking and grooming in the hot spring in Jigokudani, Japan.
Japanese Macaque (Macaca fuscata) pair rest together on a rock near the river in Jigokudani, Japan. - Diane  McAllister
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Diane McAllister / Japanese Macaque (Macaca fuscata) pair rest together on a rock near the river in Jigokudani, Japan.
Japanese Macaque (Macaca fuscata) adult with wet snowy head in the hot springs of Jigokudani, Japan. - Diane  McAllister
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Diane McAllister / Japanese Macaque (Macaca fuscata) adult with wet snowy head in the hot springs of Jigokudani, Japan.
Japanese Macaque (Macaca fuscata) adult in the hot springs of Jigokudani, in the snow, Japan. February - Diane  McAllister
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Diane McAllister / Japanese Macaque (Macaca fuscata) adult in the hot springs of Jigokudani, in the snow, Japan. February
Japanese Macaque (Macaca fuscata) young one, appearing quite relaxed in thermal pool, even falling asleep, in Jigokudani, Japan, February - Diane McAllister,Diane  McAllister
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Diane McAllister,Diane McAllister / Japanese Macaque (Macaca fuscata) young one, appearing quite relaxed in thermal pool, even falling asleep, in Jigokudani, Japan, February
Baird's tapir (Tapirus bairdii) entering a pool of water and wallowing, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica. - Ammonite
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Ammonite / Baird's tapir (Tapirus bairdii) entering a pool of water and wallowing, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica.
African lioness (Panthera leo) growling and swatting at a sub-adult male approaching a kill, footage taken at night using thermal camera technology, Masai Mara, Kenya. - Ammonite
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Ammonite / African lioness (Panthera leo) growling and swatting at a sub-adult male approaching a kill, footage taken at night using thermal camera technology, Masai Mara, Kenya.
Large group of Black wildebeest (Connochaetes gnou) migrating across savanna in a line, footage taken at night using thermal camera technology, Masai Mara, Kenya. - Ammonite
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Ammonite / Large group of Black wildebeest (Connochaetes gnou) migrating across savanna in a line, footage taken at night using thermal camera technology, Masai Mara, Kenya.
Water buffalo (Bubalus arnee) chasing Sri Lankan leopard (Panthera pardus kotiya) near a waterhole, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka. - Ammonite
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Ammonite / Water buffalo (Bubalus arnee) chasing Sri Lankan leopard (Panthera pardus kotiya) near a waterhole, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.
Family of Sri Lankan elephant (Elephas maximus maximus) drinking at waterhole, footage taken at night using thermal camera technology, showing cooling thermoregulatory properties of ears, Yala Nationa... - Ammonite
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Ammonite / Family of Sri Lankan elephant (Elephas maximus maximus) drinking at waterhole, footage taken at night using thermal camera technology, showing cooling thermoregulatory properties of ears, Yala Nationa...
Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised... - Paul D Stewart
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Paul D Stewart / Aerial view of Grand Prismatic thermal spring in Yellowstone National Park, USA. The bright colours are natural, coming from thermophile bacteria in the water. People can be seen walking on the raised...
Wide panoramic night thermal camera shot of Asian elephants (Elephas maximus) and a herd of Spotted / Chital / Axis deer (Axis axis) in Yala National Park, Sri Lanka - Martin Dohrn
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Martin Dohrn / Wide panoramic night thermal camera shot of Asian elephants (Elephas maximus) and a herd of Spotted / Chital / Axis deer (Axis axis) in Yala National Park, Sri Lanka
Thermal camera image of hippos (Hippopotamus amphibius), crocodile (Crocodylus niloticus) and wildebeest (Connochaetes taurinus, far left) on the banks of the Mara River, Masai Mara, Kenya. Image take... - Martin Dohrn
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Martin Dohrn / Thermal camera image of hippos (Hippopotamus amphibius), crocodile (Crocodylus niloticus) and wildebeest (Connochaetes taurinus, far left) on the banks of the Mara River, Masai Mara, Kenya. Image take...
Thermal hot spring at Mud Volcano, Hayden Valley, Yellowstone National Park, Wyoming, USA. - Jeff Vanuga
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Jeff Vanuga / Thermal hot spring at Mud Volcano, Hayden Valley, Yellowstone National Park, Wyoming, USA.
Sleeping African elephants (Loxodonta africana), two adults and offspring, Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial light. - Martin Dohrn
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Martin Dohrn / Sleeping African elephants (Loxodonta africana), two adults and offspring, Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial light.
Hippo (Hippopotamus amphibius) in threat pose, Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial lighting. - Martin Dohrn
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Martin Dohrn / Hippo (Hippopotamus amphibius) in threat pose, Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial lighting.
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... - Martin Dohrn
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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...
Dead Thermal Spider encased in thermophilic bacteria in hot Spring, Yellowstone National Park, Wyoming, USA, October - Jeff Vanuga
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Jeff Vanuga / Dead Thermal Spider encased in thermophilic bacteria in hot Spring, Yellowstone National Park, Wyoming, USA, October
Kamchatka Brown bear (Ursus arctos beringianus) resting on warm ground next to thermal waters, Valley of the Geysers, Kronotsky Zapovednik Reserve, Kamchatka, Russia. - Igor Shpilenok
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Igor Shpilenok / Kamchatka Brown bear (Ursus arctos beringianus) resting on warm ground next to thermal waters, Valley of the Geysers, Kronotsky Zapovednik Reserve, Kamchatka, Russia.
Kamchatka Brown bear (Ursus arctos beringianus) skirting a steaming thermal field, Valley of the Geysers, Kronotsky Zapovednik Reserve, Kamchatka, Russia. - Igor Shpilenok
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Igor Shpilenok / Kamchatka Brown bear (Ursus arctos beringianus) skirting a steaming thermal field, Valley of the Geysers, Kronotsky Zapovednik Reserve, Kamchatka, Russia.
Japanese macaque warming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan - Ingo Arndt
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Ingo Arndt / Japanese macaque warming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan
Japanese macaque warming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan - Ingo Arndt
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Ingo Arndt / Japanese macaque warming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan
Japanese macaques warming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan - Ingo Arndt
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Ingo Arndt / Japanese macaques warming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan
Japanese macaques grooming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan. These primates can survive winter temperatures below -15 degrees by bathing in the springs - Ingo Arndt
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Ingo Arndt / Japanese macaques grooming in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan. These primates can survive winter temperatures below -15 degrees by bathing in the springs
Japanese macaque being groomed in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan - Ingo Arndt
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Ingo Arndt / Japanese macaque being groomed in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan
Japanese macaques with young in hot spring {Macaca fuscata} Joshin-etsu NP, Japan - Ingo Arndt
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Ingo Arndt / Japanese macaques with young in hot spring {Macaca fuscata} Joshin-etsu NP, Japan
Sunrise through thermal fog and lone tree, Snake River, Grand Teton National Park, Wyoming - Gerry Ellis
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Gerry Ellis / Sunrise through thermal fog and lone tree, Snake River, Grand Teton National Park, Wyoming
Galapagos Giant Tortoise (Chelonoidis nigra) pair and thermal vents, Galapagos Islands, Ecuador - Mitsuaki Iwago
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Mitsuaki Iwago / Galapagos Giant Tortoise (Chelonoidis nigra) pair and thermal vents, Galapagos Islands, Ecuador
Hotprings at Ensenada Perez, Patagonia, Chile. January 2017. - Rhonda Klevansky
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Rhonda Klevansky / Hotprings at Ensenada Perez, Patagonia, Chile. January 2017.
RF - Petrified trees and travetine cascade. Geothermal feature at Mammoth Hot Springs. Yellowstone National Park, USA. (This image may be licensed either as rights managed or royalty free.) - Nick Garbutt
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Nick Garbutt / RF - Petrified trees and travetine cascade. Geothermal feature at Mammoth Hot Springs. Yellowstone National Park, USA. (This image may be licensed either as rights managed or royalty free.)
Building fitted with warm pitched roof insulation by installing insulating sandwich panels, Belgium, March 2019. - Philippe Clement
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Philippe Clement / Building fitted with warm pitched roof insulation by installing insulating sandwich panels, Belgium, March 2019.
White stork (Ciconia ciconia) in flight thermal soaring with spread wings against blue sky, France. - Philippe Clement
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Philippe Clement / White stork (Ciconia ciconia) in flight thermal soaring with spread wings against blue sky, France.
Strokkur, a highly active erupting hot spring. Iceland, May. - Espen Bergersen
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Espen Bergersen / Strokkur, a highly active erupting hot spring. Iceland, May.
Hot spring called 'Geysir' which has been quiet for many years. Iceland. May 2016. - Espen Bergersen
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Espen Bergersen / Hot spring called 'Geysir' which has been quiet for many years. Iceland. May 2016.
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