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Science  20 Sep 2013:
Vol. 341, Issue 6152, pp. 1325-1326
DOI: 10.1126/science.341.6152.1325-c

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The 2013 Ig Nobel prizes honor research that "makes people laugh, and then makes them think." Among the winners: scientists who discovered that dung beetles use the Milky Way to navigate, and a team that found that mice with heart transplants lived three times longer when exposed to opera music.