Colorado Gov. Bill Ritter declared a state of emergency Tuesday, after a wildfire near Boulder reached an estimated size of more than 7,100 acres and caused 3,100 people to flee their homes. What are some factors that can set wildfires ablaze?
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This futuristic Ferris wheel was only supposed to stay put for five years. But with millions of tourists boarding its capsules, the city decided to keep it around. How was it built?
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Each country and each region within each country has its own laws regarding the right to cultural property. So, how do you know which artifacts belong to the government and which are "finders keepers"?
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We may flip on light switches without giving any thought to what makes them work, but how did people come to understand electricity in the first place? HowStuffWorks.com blogger Sarah Dowdey explores history to find out.
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