In biophilically designed spaces there are plenty of natural materials, slate and stone on floors, for example, and wood with visible grain on floors, walls, table tops, wherever it might be. Using wood with visible grain has been extensively researched and shown to be a powerful de-stressor, boosting mental and physical wellbeing—we’re not only more relaxed in spaces featuring wood surfaces, but also better able to concentrate in them. It seems at a certain level, we’ve always known that looking…