Ions in the Spotlight (IMAGE) University of Freiburg Caption Lasers of various wavelengths are used to cool the ions to a thousandth of a Kelvin at the start of an experiment. Credit Photo: Julian Schmidt 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.