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Wild boars use an internal compass to navigate

California's 66 million dead trees pose an extreme wildfire risk

Researchers discover 'bright spots' where coral reefs are thriving

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Birds are wicked smart, despite their small brains

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Photo blog

Who needs fireworks when you have the stars?

Witnessing a great white shark breach ... terrifying, awesome or both?

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Photo galleries

12 types of waterfalls to see in your lifetime

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10 facts to change the way you think about donkeys

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How to identify 10 common butterfly species

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