A number of milk samples bought online purporting to be human breast milk include cow DNA, according to an analysis performed by Ohio State University's Jesse Kwiek and his colleagues. Such buying and selling online of breast milk is on the rise, the Los Angeles Times notes, even as the US Food and Drug Administration recommends against the practice.

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Lawmakers have asked four direct-to-consumer genetic testing companies to explain their privacy policies and security measures, according to Stat News.

The Trump Administration has proposed a plan to reorganize the federal government, the Washington Post reports.

In Science this week: genetic overlap among many psychiatric disorders, and more.

The Economist writes that an increasing number of scientific journals don't do peer review.