I t’s like watching a rerun while you’re sleeping: Once again, you show up for a class not knowing there’s a test, or lose control of your car while driving, or get chased by a shadowy figure. Recurring dreams have a way of popping up again and again. “The dreams contain the same content, emotions, or narrative structure,” explains Antonio Zadra, a professor of psychology and senior researcher at the Center for Advanced Research in Sleep Medicine at the University of Montreal. Common themes