Science

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As global temperatures rise, cities face the challenge of keeping their infrastructure and residents cool. Chicago is tackling the problem with a green design makeover that includes 369 green roofs covering 5.5 million square feet -- more than any other…

Nobel Prize winner Sir John Gurdon talks to reporters on Oct. 8, 2012 in London. Gurdon and Shinya Yamanaka from Japan have both been awarded the Nobel prize for medicine or physiology for their work as pioneers of stem cell…