This Week in PLOS

A PLOS One study of snail genetics has unearthed similarities amongst Cepaea nemoralis snails in the Pyrenees and Ireland suspected of stemming from ancient human sea travel between the locales. A pair of researchers from the University of Nottingham used two mitochondrial markers to classify nearly 900 C. nemoralis snails from populations across Western Europe and the UK into seven mitochondrial lineages.

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

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

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