This Week in Nature

In this week's Nature, researchers from the University of Chicago report on the discovery that a single gene, and not a cluster of linked genes as previously thought, can affect the entire wing pattern of butterflies to make them resemble that of a toxic species. In some butterflies, the female is capable of mimicking the wing pattern of another, toxic insect, which offers a survival benefit.

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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.