Scientific American Editor in Chief John Rennie talks about the content of the February issue, including naked singularities and the greenhouse hamburger. N.Y.U. journalism professor Jay Rosen discusses social media. Plus, we'll test your knowledge about some recent science in the news. Web sites related to this episode include www.SciAm.com/sciammag; journalism.nyu.edu/pubzone/weblogs/pressthink
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