3 out of 10

Three of the ten scientists to win this year's National Medal of Science and National Medal of Technology and Innovation, the USA's highest honor for achievement and leadership in advancing the fields of science and technology, are chemists. "These scholars and innovators have expanded our understanding of the world, made invaluable contributions to their fields, and helped improve countless lives," President Obama said. Bruce Alberts is an internationally-renowned biochemist and Professor Emeritus at the University of California, San Francisco, Judith Klinman is a physical-organic chemist renowned for her work on enzymes. She is currently a professor of chemistry and of molecular and cell biology at the University of California, Berkeley, Jerrold Meinwald is considered one of the fathers of chemical ecology. He is currently the Goldwin Smith Professor of Chemistry Emeritus at Cornell University.