Watch Elizabeth Donley, Ph.D., an atomic physicist, share how she works as an atomic clock expert in the Time and Frequency Division at the National Institute of Standards and Technology (NIST) in Denver, Colorado. Her work at NIST helps support innovation for the US government and the tech industry. Atomic clocks are the most accurate way to measure time, so be sure to watch her video to learn how and why. She encourages any girl who loves physics to consider it as a career, and hopes more women will join her in the exciting work physicists get to do.