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Darkness in Antarctica's Weddell Sea gives this comb jelly a chance to show off its candy-colored bioluminescent cells.
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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