Although the recent news about actress Angelina Jolie's decision to opt for mastectomy based on her BRCA1 status might suggest to the public that genomic testing will enable many people to make similar, well-informed decisions, science journalist David Ewing Duncan says that his family's experience shows that there is a long way to go before most people can make such knowledgeable choices.

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In Science this week: mtDNA analysis give glimpse into decline of Neanderthals in Europe, and more.

The University of Arizona's Raina Maier writes that an understanding of the Earth's microbiome is needed.

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