From Tusk to Cartel

Using genetic tools, researchers have traced elephant poaching and ivory smuggling back to a handful of cartels, the New York Times reports. It adds that that there are only some 400,00 elephants left globally and that poachers kill about 40,000 elephants a year.

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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.