The microRNA lin-4, which was previously found to play a role in developmental timing in C. elegans, also regulates lifespan in the worm, according to research from the lab of Yale University's Frank Slack.

The findings, published in the Dec. 23 issue of Science, suggest the existence of a "developmental clock" controlling aging, and may ultimately lead to human therapies for various age-associated disorders.

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Publication of He Jiankui's work on gene-edited infants would raise ethical concerns for journals, Wired and others report.

The New York Times reports that evidence linking trauma in one generation to epigenetic effects that influence subsequent generations may be overstated.

ScienceInsider reports that US National Institutes of Health researchers were told in the fall they could not obtain new human fetal tissue.

In PNAS this week: skin pigmentation evolution among KhoeSan, biomarkers for dengue virus progression, and more.