The American Association for the Advancement of Science names Sudip Parikh its next chief executive officer, applying his scientific, policy and business expertise in support of the organization’s mission to advance science and serve society.

Researchers have discovered a bacterium that can live and grow off arsenic, a new study reports. The findings point for the first time to a microorganism that is able to use a toxic chemical (rather than the usual phosphate) to sustain growth and life.

The study is being published online 2 December at the ScienceExpress Web site.