The Spread of TB

The growth and spread of Mycobacterium tuberculosis parallels that of the human race, a new study in PLOS Pathogens says. The University of Wisconsin-Madison's Caitlin Pepperell and her colleagues examined sequence data from more than 60 TB strains to search for evidence of positive and negative selections as well as any regional differences in selection.

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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.