Here's a sentence that resonates: At conferences, "while some people trade business cards with aplomb, others clump with coworkers, rarely venturing beyond the safety of their pre-existing social circle." So begins an article in MIT's Technology Review about scientists studying social interactions at conferences and networking events by giving attendees badges with built-in infrared sensors, radios, and microphones.

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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.