When your brain has grown tired learning, remembering, etc., design can encourage a quick mental refresh when: You can see through a nearby window to nature outside, particularly if quietly flowing, “friendly” looking water is in view. When more different types of plants are visible, that’s also a plus. Even a window box right outside your window, whose contents you can see, will help. So do nearby green roofs. The art around you brings nature to mind, featuring nature scenes,…