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Big Issues
Environment
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Environment
19 Ways Arctic Climate Change Could Unleash a Global Catastrophe
A Day to Mark Fallen Species
What Trump Could Mean for America’s Public Lands
Hunter Who Helped Kill Cecil the Lion Gets Charges Dropped
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A View From the Atlantic: Trouble Comes From Shore
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Planetary Probes: Where Are They Now?
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Underwater Ballet: Sardine School Dances to Coldplay's 'Viva La Vida' (VIDEO)
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Taiwan Erecting Maybe Coolest Tower Ever (PHOTOS)
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