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The Biggest Scientific Breakthrough of 2013?

Is therapeutic cloning the biggest scientific breakthrough of 2013?
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The biggest scientific breakthrough of 2013 is…

According to stem cell scientist Paul Knoepfler, the generation of normal human embryonic stem cells (hESC) is the breakthrough of the year. Knoepfler is careful to distinguish between therapeutic cloning, on the one hand, and reproductive cloning, on the other hand. The latter, which has never been achieved, might be coming sooner than most imagine, Knoepfler notes. 

Read more about therapeutic cloning here. 

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