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See young prairie dogs performing what scientists believe is a recognition ritual, touching noses and even occasionally locking teeth.
Travel to Mount Kilimanjaro in Tanzania to see an African elephant attended by cattle egrets.
See a photo of an exotic sea moth seeking food with its long nose in Papua New Guinea's Milne Bay.
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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