Gerrit Vyn / Jonah natural gas field south of Pinedale, Wyoming.
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Alex Hyde / Chlorophyte or green alga (Volvox aureus) in pond water. UK. The larger spheres are approximately 0.5mm in diameter. Digital composite image.
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Pal Hermansen / Composite of flying butterflies (Lepidoptera) on sphere.
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Paul Williams / View from plane of eroded salt dome, Kavir Desert, Iran, December.
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Martin Gabriel / Rounded boulder with crack, Erebuni State Reserve near Yerevan, Armenia
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Pal Hermansen / Spherical stone on Champ Island, Franz Josef Land, Russia, July 2004.
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Franco Banfi / Blue jack mackerel, (Trachurus picturatus) baitball, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean
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Juan Carlos Munoz / Boruca woman with stone spheres, created by the ancestors of indigenous Boruca peopla, Costa Rica. December 2014.
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John Cancalosi / Sanidine, high temperature form of potassium feldspar, K(AlSi3O8), from near Beaverdell, British Columbia, Canada
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John Cancalosi / Sanidine, high temperature form of potassium feldspar, K(AlSi3O8), from near Beaverdell, British Columbia, Canada
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Bryan and Cherry Alexander / Self portrait of photographer Cherry Alexander in the reflection of the metallic sphere at the ceremonial South Pole, Antarctica.
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Bryan and Cherry Alexander / Photographer Cherry Alexander at the ceremonial South Pole, Antarctica.
