This Week in Nature

Researchers at the University of Pennsylvania show in Nature this week that miR-34 "regulates age-associated events and long-term brain integrity in Drosophila." In its analysis, the team uncovered evidence that "miRNA-dependent pathways may have an impact on adult-onset, age-associated events by silencing developmental genes that later have a deleterious influence on adult life cycle and disease." The Penn team adds that miR-34 may be important in those processes.

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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.