Not Wanted

A Stanford University study suggests that, like organ transplants, human embryonic stem cells may come with a high probability of rejection. Joseph Wu and his colleagues injected hESCs into mice with compromised immune systems and into normal mice. The mice with compromised immune systems did well while the others died within 10 days. "[This result is] not a disappointment, it's more of a reality check," Wu says at sciam.com.

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US National Science Foundation is continuing its responsible research conduct training policy despite its flaws, ScienceInsider reports.

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