Manmade Eggs

October 4, 2012 - 1:36 PM
This undated photo provided by researcher Katsuhiko Hayashi shows an adult mouse which was born from an egg cell produced from a skin cell, and her pups born normally. The eggs were produced by making skin cells revert to a kind of blank slate, so they could be prodded to develop into immature egg cells. The new work was reported online Thursday, Oct. 3, 2012, in the journal Science by a team at Kyoto University. (AP Photo/Science, Katsuhiko Hayashi)