As biological research races forward, ethical quandaries are piling up. In a report published in the journal eLife, researchers at Harvard Medical School said it was time to ponder a startling new prospect: synthetic embryos.
"A New Form of Stem-Cell Engineering Raises Ethical Questions" is from the March 21, 2017 Science section of The New York Times. It was written by Carl Zimmer and narrated by Caroline Miller.
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