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Science  23 Jul 2010:
Vol. 329, Issue 5990, pp. 379
DOI: 10.1126/science.329.5990.379

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ScienceNOW reported this week on a way to better quantify a couple's chance of having a child using IVF, why gorillas play tag, a Jupiter-sized comet, and new studies showing that adult cells reprogrammed to resemble embryonic cells retain signatures of the tissue from which they came, among other stories.