This Week in Nature

In this week's Nature, an international research team reports the sequenced genome of a human infant who lived in Alaska roughly 11,500 years ago, providing genetic evidence that all Native American populations arose from the same source population during a single migration event in the Late Pleistocene. By comparing the infant's genome to other ancient and modern ones, the scientists found that the infant is closely related to present-day Native Americans.

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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.