This Week in PNAS

In the early, online version of the Proceedings of the National Academy of Sciences, a group from Germany and the US looks at whether post-traumatic stress disorder stemming from childhood events coincides with distinct gene expression and epigenetic profiles in individuals' blood samples.

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National Geographic reports that marine mammals have lost a gene that could make them more susceptible to organophosphate damage.

NPR reports on Human Cell Atlas Consortium's effort to catalog all the different cell types within the human body.

The Union of Concerned Scientists surveyed US government scientists about Trump Administration policies and more, Science reports.

In PNAS this week: history and genetic diversity of the scarlet macaw, approach for predicting human flu virus evolution, and more.