This Week in PNAS

Scientists at the RIKEN Center for Developmental Biology have used metabolomics to measure internal body time. Performing blood metabolome analysis on mice, they were able to measure hundreds of clock-controlled metabolites in mouse plasma; using the scan, they found body time under various conditions, which included differences in genetic background, sex, age, and feeding patterns.

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Senator Elizabeth Warren (D-Mass.) has released the results of a genetic ancestry analysis, the Boston Globe reports.

Retraction Watch's Ivan Oransky and Adam Marcus report that Harvard Medical School and Brigham and Women's Hospital have recommended that more than 30 papers from a former researcher be retracted.

Thomas Steitz, who won the 2009 chemistry Nobel Prize for his ribosome work, has died, the Washington Post reports.

In PLOS this week: mechanisms for genes implicated in coronary artery disease, rumen microbes and host genetics influence cow methane production, and more.