The "ticking" of atoms (IMAGE) University of Colorado at Boulder Caption From left to right, Adam Kaufman, Nelson Darkwah Oppong, Alec Cao and Theo Lukin Yelin inspect an atomic optical clock at JILA. Credit Patrick Campbell/CU Boulder Usage Restrictions Use with credit only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.