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| A scientist removes the nucleus from a human egg using a pipette. This is the first step to making personalized embryonic stem cells. |
Another breakthrough in science, after more than a decade of false starts, National Geographic reports that, Oregon Health and Science University researchers announced they had cloned human embryos and collected stem cells from them. They also grew the cells into specialized skin and heart cells, a first step toward using them in transplant medicine. The key to the team's success turned out to be the addition of caffeine to the cloning process. Now researchers will seek to discover whether these cells or similar "induced" stem cells, made without embryos, will have the most medical use.
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