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Shadows creep across a densely wooded mountain peak.
Shadows creep across a densely wooded mountain peak.
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Icy water ripples around snow-dusted mountains in Alaska.
Icy water ripples around snow-dusted mountains in Alaska.
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A band of clouds drifts past a rugged, snowy summit.
A band of clouds drifts past a rugged, snowy summit.
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Hikers in winter gear pack their backpacks during a blizzard.
Hikers in winter gear pack their backpacks during a blizzard.
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Hikers in winter gear pack their backpacks during a blizzard.
Hikers in winter gear pack their backpacks during a blizzard.
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A driver tries to keep warm in his stationary car as snow falls heavily.
A driver tries to keep warm in his stationary car as snow falls heavily.
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A protective atmosphere surrounds planet Earth over rivers, plains, and mountains.
A protective atmosphere surrounds planet Earth over rivers, plains, and mountains.
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Low, wispy clouds drift past snowy summits.
Low, wispy clouds drift past snowy summits.
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Various dinosaurs inhabit a forest below the protective atmosphere of a prehistoric Earth.
Various dinosaurs inhabit a forest below the protective atmosphere of a prehistoric Earth.
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Low clouds race over fishing boats on Cape Cod.
Low clouds race over fishing boats on Cape Cod.
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A cloudy sky glows at sunset beyond Rio de Janeiro, Brazil.
A cloudy sky glows at sunset beyond Rio de Janeiro, Brazil.
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The sun filters through the clouds over a forest.
The sun filters through the clouds over a forest.