So... It's Not Flat?

Richard Thaler at Edge asks people for their favorite examples of wrong scientific beliefs, such as the world being flat and more. Scripps' Eric Topol responds that in medical school he was taught that one cells differentiated into heart muscle or nerves that they can never regenerate. "Wrong!! Enter the stem cell and regenerative medicine era," he adds. Derek Lowe names the four humors theory of physiology and that bad air caused infectious disease.

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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.