Just looking out your window can have a relaxing effect. In a study led by Peter Kahn, an associate professor of psychology at the University of Washington in Seattle, participants in an office were shown one of three views: a natural setting, a digital display of the same scene, and no view. When stress levels were artificially increased, those looking at the real natural scene returned to their normal heart rate more quickly. Those who looked at the digital display did no better than those looking at a blank wall, suggesting the brain is not easily fooled. “We do best mentally and physically when we’re connected to nature,” says Kahn.