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A gull soars near an islet along a coast in Iceland.

Pre-K - Higher Ed
A gull soars near an islet along a coast in Iceland.
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Gulls flock near an islet in a sea along the coast of Iceland.

Pre-K - Higher Ed
Gulls flock near an islet in a sea along the coast of Iceland.
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Dressed stones lie in a pile on the desert amid the ruins of an ancient structure.

Pre-K - Higher Ed
Dressed stones lie in a pile on the desert amid the ruins of an ancient structure.
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Dry, flat plains give way to rolling, arid hills.

Pre-K - Higher Ed
Dry, flat plains give way to rolling, arid hills.
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'Static view of sandstone fins, wide.'

Pre-K - Higher Ed
Wide static view of sandstone fins in Arches National Park.
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Cirrus clouds drift over ice-covered mountains in Alaska.

Pre-K - Higher Ed
Cirrus clouds drift over ice-covered mountains in Alaska.
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Detail of Jaizkibel Coast

Pre-K - Higher Ed
Detail of Jaizkibel Coast
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Steam drifts above the Mt. Vesuvius crater.

Pre-K - Higher Ed
Steam drifts above the Mt. Vesuvius crater.
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Haze partially obscures Mt. Vesuvius and the city of Naples.

Pre-K - Higher Ed
Haze partially obscures Mt. Vesuvius and the city of Naples.
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Mt. Vesuvius looms over Naples, Italy.

Pre-K - Higher Ed
Mt. Vesuvius looms over Naples, Italy.
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People running time lapse

Pre-K - Higher Ed
People running time lapse in stadium.
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Snow dusts the rugged peaks of the Wasatch Mountains, Utah.

Pre-K - Higher Ed
Snow dusts the rugged peaks of the Wasatch Mountains, Utah.
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Archaeologists walk through rocky terrain in Egypt.

Pre-K - Higher Ed
Archaeologists walk through rocky terrain in Egypt.
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A mining cave opens into a hill near a wadi in the ancient emerald mining town of Sikait, Egypt.

Pre-K - Higher Ed
A mining cave opens into a hill near a wadi in the ancient emerald mining town of Sikait, Egypt.
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Kilauea Fumarole at night. HD - Halemaʻumaʻu

Pre-K - Higher Ed
Kilauea crater fumarole at night, note the pulses of the volcano, changing the intensity of the light reflected at the fumarole.
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The sun shines above the Colorado River.

Pre-K - Higher Ed
The sun shines above the Colorado River.
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The Colorado River is rimmed with hills and mountains.

Pre-K - Higher Ed
The Colorado River is rimmed with hills and mountains.
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High walls of sandstone fins.

Pre-K - Higher Ed
An upward panning shot of a narrow canyon near Sand Dune Arche in Arches National Park.
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HD: Sightseeing Grand Canyon

Pre-K - Higher Ed
HD1080p: Group of tourists hiking in Grand Canyon, tilt up view to the rocky mountain range. Arizona. USA.
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HD: Trekking in Grand Canyon

Pre-K - Higher Ed
HD1080p: Group of tourists trekking at Grand Canyon in Arizona. USA.
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Canyon walls cast shadows into a grassy gorge.

Pre-K - Higher Ed
Canyon walls cast shadows into a grassy gorge.
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Snowy mountains overlook the Kamchatka Peninsula.

Pre-K - Higher Ed
Snowy mountains overlook the Kamchatka Peninsula.
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Silver mine

Pre-K - Higher Ed
Silver mine
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Silver mine

Pre-K - Higher Ed
pure silver