The nuclear disaster in Japan has left many people in danger of exposure to radiation and radioactivity. Some are simply fearful. What exactly is this radiation? And what threat does it pose? We've got some answers below.
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Source: http://feeds.gawker.com/~r/gizmodo/full/~3/4htRSekgum4/how-does-radiation-travel-and-what-kinds-of-damage-can-it-do
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