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Science  03 May 2013:
Vol. 340, Issue 6132, pp. 531-533
DOI: 10.1126/science.340.6132.531

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This week, President Barack Obama delivered a speech at the U.S. National Academy of Sciences to celebrate its 150th anniversary, the debate over the "volcanic winter" scenario at Mount Toba continues, and researchers have discovered the original color of Abraham Lincoln's funeral train car.