May 7, 2012 | 1
Professional "free divers" have no trouble holding their breath for minutes at a time. What stops us from doing the same? In this episode, Scientific American's Katherine Harmon--and Katherine Harmon--explore the limits of human physiology.
Deadline: Jun 30 2013
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This is a Reduction-to-Practice Challenge that requires written documentation and&
Deadline: Jul 25 2013
This challenge provides an opportunity for Solvers to build a web-based or mobile “app” to explore data relationships in scholarly conte
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