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
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Denis-Huot / Masai giraffe (Giraffa camelopardalis tippelskirchi) in distance silhouetted at sunrise with clouds, Masai-Mara Game Reserve, Kenya. September.
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Denis-Huot / Masai giraffe (Giraffa camelopardalis tippelskirchi) herd at sunrise, Masai-Mara Game Reserve, Kenya. November.
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Denis-Huot / Crowned crane (Balearica regulorum gibbericeps) pair at sunrise, Masai-Mara Game Reserve, Kenya. June.
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Denis-Huot / Masai giraffes (Giraffa camelopardalis tippelskirchi), at sunrise, Masai-Mara Game Reserve, Kenya. March.
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Arne Hodalic / Nenet herdsman with Reindeer (Rangifer tarandus) during summer migration, Yamal Peninsula, Russia. May.
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Pete Oxford / Konyak Naga tattooed Ang or Chief. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.
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Eric Baccega / Salt caravans made up of hundreds of Dromedary camels (Camelus dromedarius) and their pullers transporting salt slabs cut from Lake Assale to the Mekele Market, Danakil depression, Afar region, Ethiop...
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Sven Zacek / Cross-country skiier on a moonlit night admiring the Northern Lights (Aurora borealis), Norway, March 2013.
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Steven Kazlowski / Photographer in front of Northern lights / Aurora borealis glowing brightly over the frozen eastern Beaufort Sea, Arctic National Wildlife Refuge, Alaska Model released.
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Denis-Huot / Group of male African lions (Panthera leo) resting with storm clouds overhead, Masai-Mara Game Reserve, Kenya. September.
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Denis-Huot / African elephant (Loxodonta africana) herd at sunset, Masai-Mara Game Reserve, Kenya. January.
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Jim Brandenburg / American Bison (Bison bison) herd on prairie with quartz, Blue Mounds State Park, Minnesota
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John Cancalosi / Brazilian agate, slice, with MR. Sad Face design.
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Niall Benvie / Close-up of quartz vein in rock, abstract. Scotland, February.
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John Cancalosi / Quartz (SiO2, silicon dioxide), the most common mineral on earth, used in making glass and other industrial uses.
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Jack Dykinga / Eroded formation known as the 'Tres Maries', in the Valle de la Luna. One million year old composition of gravel, clay, salt, gems and quartz, against The Milky Way and Southern Cross in the night sky...
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Jack Dykinga / Eroded rock formation known as the 'Tres Maries', in the Valle de la Luna. One million year old composition of gravel, clay, salt, gems and quartz, against The Milky Way and Southern Cross in the nigh...
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John Cancalosi / Azurite-malachite rock slab, cut and polished, white quartz with veins azurite and malachite copper minerals, occurs in copper-bearing rocks in central Siberia. Stepnoye Mine, Altay Mountains, Siberia...
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Heather Angel / Quartz-sanstone pillars covered with Wulingyuan pine trees (Pinus spp). Zhangjiajie National Forest Park, Wulingyuan Scenic Area, Hunan Province, China.
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Jack Dykinga / Titus Canyon conglomerate and quartz formations, Death Valley National Park, California, USA, March 2019.
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Graham Eaton / Triassic age Conglomerate and Sandstone, part of the Otter Sandstone Formation. The conglomerate pebbles mostly comprize quartz and quartzite reaching 20cm in diameter. Budleigh Salterton, Devon, UK,...
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Graham Eaton / Quartz infilled tension cracks in a boulder on the beach. Millock Haven, Cornwall, UK, March
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Graham Eaton / A Tertiary age dolerite dyke intruded into foliated, Pre-Cambrian age quartz mica schist near Rhosneigr, Anglesey, Wales, UK, June
