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One in three Americans are diagnosed at some point in their lifetime with cancer, a derangement of normal cell growth in which cells grow in antisocial ways, crossing natural tissue boundaries. 
Last week in NYC, we attended the Economist’s summit on “Intelligent Infrastructure,” which covered investment issues, new technologies, scenarios for urban growth, and sociological questions about the future role of the city.
Ink-jet printing technology has inspired scientists to look for ways to build sheets of skin that could one day be used for grafts in burn victims, experts said Sunday.
How much more crowded is our planet going to get? Will we keep on expanding indefinitely, or are we approaching the upper limit? Can the planet sustain ten billion people?