Sleep and melatonin study (IMAGE) University of Colorado at Boulder Caption Researchers take melatonin samples from children participating in a study of how light at night impacts bodily rhythms. Credit CU Boulder/Casey Cass Usage Restrictions Must credit CU Boulder 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.