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.