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Photos

Underwater Exploration

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Photo: Alvin, an underwater submersible
Photo: Alvin, an underwater submersiblePhoto: Aquarius, an underwater research labPhoto: Underwater divers examine a diving vesselPhoto: Diver swims through giant sea kelp in Monterey Bay, CaliforniaPhoto: Sea otter in Monterey Bay, CaliforniaPhoto: Scientists observe penguins underwater in AntarcticaPhoto: Diver examines table coral, Phoenix Islands, Kiribati
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Alvin, an underwater vessel, travels across the floor of the Caribbean Sea. Alvin began working in 1964 and was the first deep-sea vessel that could carry passengers.
Photograph by Emory Kristof 
National Geographic.com
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