We started with the basics of Leonardo’s method — we watched and asked questions. What is the difference between the greenery of trees? Where does the shadow come from? What is the «leaf rule»? How detailed the movement of water can be described? All these questions seemed especially relevant for us on Mother Earth Day, because a resident of a megalopolis is surrounded by a digital space, not a forest, and talks more often with artificial intelligence than with birds and animals. We learned how to combine the point of view of a natural scientist and of a philosopher in order of better understanding Nature and its Laws.