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Cell division rates dwindle as people age, researchers led by Johns Hopkins University School of Medicine's Bert Vogelstein report in the Proceedings of the National Academy of Sciences this week. They collected tissue samples from the colon, duodenum, esophagus, and sinuses of 13 people between the ages of 20 and 29 and of 13 people between the ages of 80 and 89.

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The Centers for Disease Control and Prevention estimates more people get sick and die from drug-resistant germs than previously thought, the Washington Post reports.

According to the Associated Press, three universities and a healthcare institution are sharing a gift of $1 billion.

New rules seek to limit the type of scientific and medical research that can be used to guide public health regulations, the New York Times reports.

In Nature this week: FreeHi-C approach simulates Hi-C data from interacting genome fragments, and more.