In the cover story, we'll hear about the potential for stem cells to turn malignant. Stem cells are already known to be at the root of a handful of cancers, and might be the cause of many more. Also, we'll hear about some of the greatest achievements of the soon-to-be-retired Hubble space telescope, learn about the advanced color vision system of birds, and hear about the real-life effects of forensics programs like C.S.I
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