Olga Kamenskaya / Pyramidal ice fragment reflected on the surface of Lake Baikal. Ice fragment acting as a prism refracting light into rainbow. Siberia, Russia, March.
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Olga Kamenskaya / Ice fragment reflected in the ice of Lake Baikal, Siberia, Russia, March.
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Olga Kamenskaya / Ice fragment on crack in Lake Baikal ice, Siberia, Russia, March.
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Olga Kamenskaya / Man looking into ice hole dug for ice diving, Lake Baikal, Siberia, Russia, March. Model released.
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Olga Kamenskaya / Clear panes of ice on Lake Baikal, Siberia, Russia, March.
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Olga Kamenskaya / Clear pane of ice, Lake Baikal, Siberia, Russia, March.
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David Pattyn / Little Grebe (Tachybaptus ruficollis) independent fledgling at 46 days, only identified as young by striped head, portrait on a misty morning. The Netherlands, July
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Olga Kamenskaya / Cracks in the ice of Lake Baikal, Siberia, Russia, March.
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Olga Kamenskaya / Cracks in the ice of Lake Baikal, Siberia, Russia, March.
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Peter Cairns / American bison (Bison bison) walking through snow using tracks made by other animals, Yellowstone National Park, Wyoming, USA, February.
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Peter Cairns / Tourists watching American bison (Bison bison) Yellowstone National Park, Wyoming, USA, February 2013.
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Peter Cairns / American Bison (Bison bison) walking through deep snow, Yellowstone National Park, Wyoming, USA, February.