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Melatonin is a hormone, released primarily by the pineal gland, that regulates the sleep–wake cycle. 3D ball-and-stick model, white background

Aerial photo taken from a small plane showing a patchwork quilt of the salt works below at Useless Loop, Shark Bay, Western Australia

Aerial view of an airplane flying over Lake Magadi in the Great Rift Valley, Kenya. Lake Magadi is the southernmost lake in the Kenyan Rift Valley, north of Tanzania's Lake Natron. The Rift Valley contains a chain of volcanoes and many other lakes such as the Turkana, Baringo, Bogoria and Nakuru. During the dry season Lake Magadi is covered by soda and is known for its wading birds. During the rainy season, a thin layer of brine covers much of the saline pan that evaporates rapidly leaving a surface of salt that cracks. The lake is recharged by saline hot springs and is very rich in blue-green algae, which feed insects and massive flocks of lesser flamingos (Phoenicoparrus minor). Altogether it forms a very peculiar mineral and colour-rich landscape. Currently the area is inhabited by the cattle-herder Masai tribes, but the relics of many hominids have been found in the escarpments.

Aerial view of Phaselis Bay in Antalya, Turkiye.

Landscape damaged by coal mining. Aerial view of fossil fuels produced in the Czech Republic.

A large tailings pond in the Alberta Oilsands. Tailings ponds are used to separate the heavy oil bitumen from the sticky sand mined from around the area.

Dry land texture on the floor of a swamp. Global warming and greenhouse effect.

Hot river at Geothermalatea in the Haukadalur valley, east of Reykjavík, Iceland.

Waterfalls, landscapes and curiosities of São Thome das Letras - MG

Unique sandstone formations along the shoreline of Hornby Island, a popular travel destination along the west coast of Canada.

blue-green algae

This is a global environmental problem of nature pollution. Baltic sea in summer.

Aerial view of Lake Magadi Lake in the Great Rift Valley of Kenya. Lake Magadi is the southernmost lake in the Kenyan Rift Valley, north of Tanzania's Lake Natron. The Rift Valley contains a chain of volcanoes, some of which are still active, and many other lakes such as the Turkana, Baringo, Bogoria and Nakuru. During the dry season Lake Magadi is 60% covered by soda and is known for its wading birds. During the rainy season, a thin layer of brine covers much of the saline pan, but this evaporates rapidly leaving a vast expanse of white salt that cracks to produce large polygons. The lake is recharged by saline hot springs that discharge into alkaline lagoons around the lake margins and is very rich in blue-green algae, which feed insects, small crustaceans and massive flocks of lesser flamingos (Phoenicoparrus minor). Altogether it forms a very peculiar mineral and colour-rich landscape. The lake is featured in film The Constant Gardener, which is based on the book of the same name by John le Carré although in the film the shots are supposed to be at Lake Turkana. Currently the area is inhabited by the cattle-herder Masai tribes, but the relics of many hominids have been found in the escarpments.

Drought scene in Poyang Lake, Jiangxi, China

view on the green algae of the nature reserve of the bay of saint brieuc

Solar salt pans at Laguna Ojo de Liebre on the Pacific Ocean side of Baja California Sur. Mexico. Vizcaíno Biosphere Reserve UNESCO World Heritage Site. Salt evaporation ponds.

Hypertension disease renal different area under microscopy, this is art treated normal light microscopy image,for original image check my other files

$Blue Pond is a tourist destination in Hokkaido.\nIt was bluer than I expected.$

Salt Lake. Self-settling sodium chloride salt on rocks near the shore. Hypersaline water in a drying lake is an environmental problem. Kuyalnik Estuary, Ukraine

Aerial drone view of the Shubenacadie River, home to extreme tidal influence.

Faxe Kalkbrud, Limestone quarry in Denmark

Acid Water Waste From Copper Mine In Romania - Valea Sesii - entire village covered by mine waste

Cascades on the river Krupa in the canyon, Dalmatia, Croatia

Water pollution

High quality stock aerial photos of the Wildcat Creek Marsh in Richmond CA. The creek and marsh directly abuts the San Francisco Bay.

Prednisone is a glucocorticoid medication mostly used to suppress the immune system and decrease inflammation in conditions such as asthma, COPD, and rheumatologic diseases.

Aerial View Above Pond Bog Swamp Sinkhole Drain

Oyster farms

Channel of the Odiel river, with its spectacular color, in Huelva province, Spain

Aerial photo from the colorful landscape near San Miguel de Allende (Mexico).

Free Images: "bestof:Delta-octalactone.svg Chemical structure of delta-octalactone Own 13 47 7 September 2016 UTC Ed Edgar181 Delta-lactones"

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