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Germany's gorgeous Black Forest named UNESCO Biosphere Reserve

Costa Rica's Savegre River joins network of biosphere reserves

Glass eels use an inner compass to navigate the tides

9 of the world's biggest fishing firms pledge to protect oceans

What started out as a simple dog walk has raised $9 million for charity

Polar bears are walking on an ever-faster 'treadmill' of ice

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Photo blog

Winning images in dog photo contest will capture your heart

Ocean pollution is no laughing matter

Never heard of Remote Year? This photographer's zeal may change that

Pop culture and real life collide in French photographer's clever mash-ups

This canoe documentary is almost too beautiful to watch

10 of the coolest small towns in America

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Photo galleries

10 foods and beverages that boost brainpower

15 of the world's longest bridges

10 gorgeous islands that were once penal colonies

12 surprising flightless birds

10 real-life fairy tale castles

10 odd roadside attractions

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