In the most recent issue of Current Biology, researchers suggest that healthy old people lose some capacity for sleep. The research group at the University of Surrey, UK, recruited 18 participants aged between 60 and 72 years, and 35 participants aged between 18 and 32 years. They were all healthy and none had any problems in sleeping. Their sleep patterns were assessed by self-reporting, and those reports were followed up by formal monitoring overnight in a sleep laboratory. (more…)