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5. K.F.C., Contaminants can flow up waterfalls, say physicists (MIT Technology Review, 17 May 2011) ( http://ad.doubleclick.net/click%3Bh%3Dv8/3b0a/3/0/%2a/c%3B240268131%3B0-0%3B1%3B12113661%3B3454-728/90%3B41834693/41852480/1%3B%3B~sscs%3D%3f https://market.android.com/details?id=edu.mit.technologyreview )