Lawmakers in the US have made a bipartisan proposal to change the nation's immigration laws, including rules governing visas for skilled scientific workers, The New York Times reports. One bill, which was introduced in the Senate earlier this week by Orrin Hatch (R-Utah), would increase the number of temporary and permanent resident visas available for such immigrants.

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In PNAS this week: human cytomegalovirus diversity, patterns of homologous recombination in E. coli, and more.

US lawmakers are considering eliminating the medical devices tax that is part of the Affordable Care Act.

Two research teams in China home in on a gene that gives rice a long, slender shape.

Marcia McNutt, the editor-in-chief of Science, has been nominated to become president of the US National Academy of Sciences.