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This Month in Photo of the Day: Images From National Geographic Books
Penguins surface near an air hole in Antarctica, captured with a remote underwater camera.
From the National Geographic book Visions of Paradise, 2008
Out of 12,000 entries received, find out who takes home the Grand Prize!
Eighteen percent of the world's population can't get safe drinking water. Test your water knowledge.
When making long exposures, use a remote release to avoid camera movement. If you don't have a remote release, use the camera's self-timer.
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