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Sea turtles have been swimming in our oceans since the time of the dinosaurs. How much do you know about these shelled swimmers?
From leatherback hatchlings making their perilous journeys to a hawksbill turtle swimming with flippers spread like wings, see these amazing creatures in action.
While researching sea turtles in Australia, National Geographic's Crittercam team discovered a surprise in the eating habits of marine creatures.
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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