Scientists on an ice floe

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Climbers crossing a crevasse

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Explorers at base camp

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Moss-covered Tree in Forest — Green, Misty, Morning, Photograph, Trees

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Ice Climber on Frozen Waterfall — White

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Climber on Rock Face — Blue, Dramatic, Afternoon, Photograph, Mountains, Glacier

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Mountain Climbers

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Climbers on a redwood tree

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Fallen Tree in Forest — Green, Serene, Morning, Photograph, Stream

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Whitebark Pine Trunks

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Pollen Grains — Black

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Radio Telescopes in Field — Yellow

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