News2013 Runners-Up

Human Cloning at Last

Science  20 Dec 2013:
Vol. 342, Issue 6165, pp. 1436-1437
DOI: 10.1126/science.342.6165.1436-a

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Summary

Researchers announced they had derived stem cells from cloned human embryos, a long-awaited research coup that Science's editors chose as a runner-up for Breakthrough of the Year. Stem cells can develop into any of the body's cell types, an ability that makes them potentially useful for studying and treating diseases. Several types of animals have been cloned, but human cells have proved much trickier to work with. This year, a new recipe—including a dash of caffeine—solved the problem.