The world's waters are teeming with microorganisms, but what, exactly, are they all? What do they do?

Moreover, as the Bigelow Laboratory for Ocean Sciences' Ramunas Stepanauskas considered at the US Department of Energy Joint Genome Institute's 7th annual User Meeting, "what if every cell is different?"

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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.