A Wired post explores the difference between chronological and biological age. It takes a look at several studies that try to correlate age with various biomarkers, though finding true age is hard because people age at different rates. Says the post, "While dozens of biomarkers are correlated with age ... none of them is a good enough match to provide full-proof age determination. The same holds true for even the most advanced genomic expression studies."

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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.