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Watch a humpback whale burst through the surface of an Alaska bay.
See how whales' tails are used for more than just propulsion in this photo from the waters of Hawaii.
Find out why the beloved orca is neither a ruthless killer nor a whale in this feature.
Read about photographer Brian Skerry's experiences swimming with surprisingly playful 45-foot right whales.
Take a photographic journey through Montana and enter for a chance to win a trip for two!
Eighteen percent of the world's population can't get safe drinking water. Test your water knowledge.
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