The United Kingdom has made changes to its student visa system that will limit the number of foreign students studying in Britain, reports The Chronicle of Higher Education. In a statement, the UK Home Office says the aim of the change is to limit abuse of the system and to protect the "best and brightest" students.

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Researchers suggest that genetic variations could influence the side effects people experience when using synthetic cannabinoids, the International Business Times reports.

An analysis has examined the makeup of researchers on Twitter and what they share, Nature News reports.

At Stat News, Jim Kozubek argues that the Broad Institute is pushing the boundary of what a nonprofit is.

In PNAS this week: gut microbes may affect honeybee weight, phenotype and gene expression changes in DiGeorge syndrome, and more.