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Science  30 Nov 2012:
Vol. 338, Issue 6111, pp. 1133-1134
DOI: 10.1126/science.338.6111.1133

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Researchers in Austria have turned the eye of science on what makes a dahlia black, concluding that the black color comes from high levels of anthocyanins, the pigments that—at lower levels—also give orange and red dahlias their colors. In other news, a message to aliens that an MIT graduate student transcribed onto a metal disk last spring could outlast Earth itself. And this week's numbers quantify the drop in HIV infections since 2001 and the amount being committed to create a new drug research facility in Canada.