Shinya Yamanaka tells the Los Angeles Times that he started working with induced pluripotent stem cells because the stem cell field was so competitive. "I decided to go the opposite direction — [turning body cells] back to the embryonic state," he says.

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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.