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This Week in Science

In Science this week, Eric Nestler and his team explore the epigenetics of cocaine addiction. They found that repeated cocaine exposure in mice is linked to decreased histone 3 lysine 9 dimethylation levels in the nucleus accumbens, a brain region involved in reward and pleasure circuitry.

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Nature News reports that researchers in Japan hope to soon test the use of reprogrammed stem cells to treat damaged corneas.

A new approach may help limit the number of fish that are mislabeled at markets or restaurants, according to New Scientist.

At Slate, the R Street Institute's Nila Bala discusses the privacy rights of suspects that genetic genealogy approaches in law enforcement bring up.

In PNAS this week: numerous mobile genetic elements contribute to Vibrio cholerae drug resistance, troponin I mutations in sudden infant deaths, and more.