Brandon Hauer, University of Alberta (IMAGE) University of Alberta Caption PhD student Brandon Hauer is studying the relationship between oxygen and deep, restorative sleep. Credit John Ulan Usage Restrictions With credit to John Ulan 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.