To study the Nile crocodile, researchers led by Fordham University's Evon Hekkala and the University of Florida's Matthew Shirley sequenced 123 contemporary Nile crocodiles and 57 tissue samples from mummified crocodiles, including ones found in ancient Egyptian temples, says a press release from the American Museum of Natural History, where the researchers did some of their work.

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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.