Scientists and ethicists alike hailed as a breakthrough two studies showing that human skin cells can be reprogrammed to work as effectively as embryonic stem cells, thus negating the need to destroy embryos in the name of science.Separate studies from teams led by Shinya Yamanaka of Kyoto University in Japan and Junying Yu and James Thomson of the University of Wisconsin-Madison were published online Nov. 20 by the journals Cell and Science, respectively.
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