The year 2011 saw scientific research that stretched from the farthest reaches of the universe to the deepest mysteries of the cell. Following a yearly tradition, Science's editors and news staff have selected one scientific Breakthrough of the Year and nine runners-up -- and have also highlighted some areas to watch for 2012. [Access to articles may require membership or a subscription.]
This year's runners-up for Breakthrough of the Year highlight exciting developments in medicine, the history of the universe, human ancestry, and more.
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