The Runners-Up

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Science  18 Dec 2009:
Vol. 326, Issue 5960, pp. 1600-1607
DOI: 10.1126/science.326.5960.1600

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The torrent of recent gamma ray observations from the Fermi Gamma-ray Space Telescope topped the list of this year's runners-up for Breakthrough of the Year. Other notable discoveries included the long-sought receptor for a key plant hormone, mock monopoles, a drug that increases life span, ice on the moon, gene-therapy successes, insights into the properties of graphene and how to use it to make novel devices, Hubble's rebirth, and the first x-ray laser.