Stanford University School of Medicine's Ben Barres and his colleagues identified a molecular on-switch that catalyzes the transformation of immature brain cells into myelin-producing oligodendrocytes. In a study to be published in today's Neuron, the scientists found that the microRNA molecule miR-219 is found at high levels only in oligodendrocytes and that it's necessary to induce these brain cells' precursors to mature.

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A fire at a Manchester hospital may have destroyed lab equipment and data, the Guardian reports.

Researchers generate a genetic database from skeletal remains from the 1845 Franklin Expedition to the Arctic, Live Science reports.

Researchers in China have begun another trial using CRISPR/Cas9 approaches in cancer patients, according to the Wall Street Journal.

In Science this week: human DNA found in sediments from archeological sites lacking bones, and more.