Kilogram Redefined (IMAGE) DOE/Sandia National Laboratories Caption Ben Casados, Sandia technologist, looks at kilogram samples in a mass comparator. Credit Randy Montoya Usage Restrictions None License Licensed 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.