In response to a reader, blogger Janet Stemwedel offers advice on how to counter unethical behavior -- and what senior people can do to help junior scientists. First, she says, keep records and teach younger scientists to do the same. She also advises senior people to set an example and speak up.

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The apple has traveled westward and eastward along the Silk Road, according to a new genetic analysis.

In Nature this week: GWAS data used to reposition drugs for psychiatric use, and more.

Genetic disease risk information doesn't always spur people to make healthy lifestyle changes, according to the Associated Press.

A University of California, San Diego-led team has used liquid biopsies to uncover possible treatments for patients with cancers of unknown primary.