Liberals left clinging to past

Discovered by the Japanese scientist Shinya Yamanaka, the method creates stem cells without using and destroying human embryos. By studying cells created from people with inherited disorders, scientists are observing, in ways never before possible, how diseases progress and react to treatments, said Doug Melton, a Harvard University researcher.

“This is the breakthrough the stem-cell field has been waiting for,” said Beth Seidenberg, a partner at Kleiner Perkins Caufield & Byers, the Menlo Park, California-based venture-capital firm that helped start Google Inc.

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Stem cell researchers have created embryonic-cell lookalikes that don't have the cancer-causing genes found in earlier experiments.