1. Alice S. Huang is Senior Faculty Associate in Biology at the California Institute of Technology. She was previously Professor of Microbiology and Molecular Genetics at Harvard Medical School, and has served as president of the American Society for Microbiology and Dean for Science at New York University. She has been president of the American Association for the Advancement of Science (AAAS) from February 2010 to February 2011. This article is adapted from the Presidential Address she delivered at...