I’ve been trying to grasp a concept for a long time that completely changes how we perceive everyday things. We are used to thinking that the world is a stable and objective reality. Mountains stay in place, and your room remains the same even when you leave for work. But quantum physics offers an interesting hypothesis. At the most fundamental level, matter may behave like a solid object only at the exact moment someone’s attention is focused on it. There are a number of experiments that lead s