Through genetic analysis, researchers have traced the origin of brown rats to northern China, the New York Times reports.

Fordham University's Jason Munshi-South tells the Times' Carl Zimmer that the idea for the study came from wondering: "What is a New York City rat, and where did it come from?"

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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.