“Many studies have shown that spending time outside in nature, or even viewing it from a window, can benefit mood and cognitive function, as well as reduce stress and anxiety,” says Greg Bratman, assistant professor of nature, health, and recreation at the University of Washington School of Environmental and Forest Sciences. For instance, a study found that a 20-minute nature break can significantly reduce levels of the stress hormone cortisol. Other studies, Bratman says, have shown simila