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Kenyan health officials take the temperatures of passengers arriving at the Nairobi airport on Thursday. Kenya has no reported cases of Ebola, but it's a transportation hub and so is on alert.
Simon Maina/AFP/Getty Images
August 14, 2014 As the Ebola outbreak rages in West Africa, it is also unfolding — in a virtual sense — inside the computers of scientists trying to predict how far the outbreak will spread and when it will end.
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A Tunisian protester holds a baguette while taking to riot police in January 2011.
Martin Bureau/AFP/Getty Images
October 2, 2012 High food prices have often been cited as a factor behind mass protest movements. But a group of researchers say food prices can actually be used to predict when social unrest will occur. And according to their mathematical modeling, we've hit the threshold for more waves of riots.
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