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

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5 startling facts about sea stars

The trees lining California's roads are worth $1 billion a year

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5 surprising facts about orcas

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Photo blog

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

Whimsical faces spring from foraged nature

How to celebrate Midsummer like a real Swede

Why we should be fighting for the 'Galapagos of North America'

Dogs vs. sprinklers: The ultimate summertime showdown

How chameleons use ultra-sticky saliva to nab their prey

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Photo galleries

12 types of waterfalls to see in your lifetime

10 amazing images of Jupiter

9 of the worst viruses on Earth

10 facts to change the way you think about donkeys

Hairy Houdinis: 11 animal escape artists

How to identify 10 common butterfly species

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