Jai Nagarkatti has been promoted to CEO of Sigma-Aldrich, effective Jan. 1, 2006, and will become a member of the board of directors. He is currently president and COO, and will retain the title of president. He succeeds Chairman and CEO David Harvey, who will remain on the board of directors. Nagarkatti has been employed by Sigma-Aldrich for 29 years.

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The New York City medical examiner is overseeing an effort to identify missing persons using DNA, according to the Associated Press.

Nobel laureate Günter Blobel has died at 81, the New York Times reports.

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Technology Review reports that 2017 was the year of consumer genetic testing and that it could spur new analysis companies.