The spread of the sweet potato, Ipomoea batatas, has long puzzled scientists, the New York Times writes, and a new genetic analysis of the crop has not solved the mystery.
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The Union of Concerned Scientists surveyed US government scientists about Trump Administration policies and more, Science reports.
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.
In PNAS this week: history and genetic diversity of the scarlet macaw, approach for predicting human flu virus evolution, and more.