Exercise can lead to changes in people's overall health and risk of disease, the New York Times Well blog writes, but the mechanism through which those changes arise are not quite clear. "Several striking new studies, however, provide some clarity by showing that exercise seems able to drastically alter how genes operate," Gretchen Reynolds says in the Times.

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Consulting company McKinsey says diagnostics companies will have to combine genomic data analysis, electronic medical records, effective reimbursement strategies, and regulatory compliance in order to win.

A new report has found that researchers in Africa are still heavily dependent on funding from organizations in the US, Europe, and China, Nature News says.

An article in The Atlantic argues that the progress being made in science isn't keeping pace with the money and time being spent on research.

In Science this week: a CRISPR screen identifies sideroflexin 1 as a requisite component of one-carbon metabolism, and more.