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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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Researchers trace DNA on a clay pipe found at a former slave site to a population that lives in what is now Sierra Leone, the Washington Post reports.

Two researchers report on their genetic analysis of samples from a shawl thought to belong to a victim of Jack the Ripper, ScienceInsider reports.

Japan is to release rules governing some gene-edited food, according to NHK World.

In PLOS this week: computational strategy for improving gene set analysis testing, miRNAs linked to sleep apnea, and more.