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9 household items dirtier than a toilet seat
The games of the XXX Olympiad are being called the first "social media" games because of the heavy influence from sites such as Facebook and Twitter. See some of London 2012's most memorable tweets from the Olympians themselves.
As the lava continues to flow through vegetation on the Big Island, University of Hawaii scientists and students have developed a model to track the smoke and where it goes.
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