New Human Embryo Models Spark Needless Controversy
Recent news of complex embryo models revived debates over stem cells and human cloning. But biology says there’s nothing to worry about
![New Human Embryo Models Spark Needless Controversy](https://static.scientificamerican.com/sciam/cache/file/123C9E33-74D1-4159-BB6445EFC3B79F32_source.jpg?#)
Recent news of complex embryo models revived debates over stem cells and human cloning. But biology says there’s nothing to worry about
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