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How do you trap a molecule? Very carefully — ba-dum-bum. Seriously, what may sound like the beginning to a corny joke is the work of researchers at New York University, who have created very tiny, "self-assembling cages" to trap molecules, one by one, says Scientific American's Sophie Bushwick. The" cages" are actually three-dimensional truncated octahedrons that self-assemble with hydrogen bonds.

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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.