Ingo Arndt / Cloudy sky over meadow, Lake Clark National Park, Alaska, USA, July.
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Ingo Arndt / Clouds over Lake Clark National Park, Alaska, USA, July.
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Ingo Arndt / Bog in boreal forest, Lake Clark National Park, Alaska, USA. June.
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Ingo Arndt / Chocolate Lily (Fritillaria camschatcencis) in flower, Lake Clark National Park, Alaska, June.
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Ingo Arndt / Grizzly bear (Ursus arctos horribilis) mother and cub looking out for dangerous male, Lake Clark National Park, Alaska, USA, June.
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John Cancalosi / Spherulite in the Silver Cliffs, Colorado. In petrology, spherulites are small, rounded bodies that commonly occur in vitreous igneous rocks.
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Mark MacEwen / Estes Town, Estes Park, Larimer County, Rocky Mountains, Colorado, United States, September 2009.
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Mark MacEwen / American Elk (Cervus canadensis) stag on golf course during the rut, in Estes Town, Rocky Mountains, Colorado, America, September.
