In the past several months, a bevy of studies have added to a growing literature on the mental and physical benefits of spending time outdoors. That includes recent research showing that short micro-breaks spent looking at a nature scene have a rejuvenating effect on the brain – boosting levels of attention – and also that kids who attend schools featuring more greenery fare better on cognitive tests. And Monday, yet another addition. It's a cognitive neuroscience study, meaning not only that benefits from a nature experience were captured in an experiment, but also that their apparent neural signature was observed through brain scans. 38 individuals who lived in urban areas, and who had "no history of mental disorder," were divided into two groups – and asked to take a walk. Half walked for 90 minutes through a natural area. The other half walked along a very busy road. Before and also after the walk, the participants answered a questionnaire designed to measure their tendency toward "rumination," a pattern of often negative, inward-directed thinking and questioning that has been tied to an increased risk of depression. Finally, both before and after the walk, the participants had their brains scanned. The result was that individuals who took the 90-minute nature walk showed a decrease in rumination. And their brain activity also showed a change consistent with this result. Spending time outdoors, in nature, is good for you.