"In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time." Leonardo da Vinci The Renaissance genius in this quote artistically expressed the flow of time leaving us at the expense of the eternal present. Today scientists, especially theoretical physicists, imagine non-linear time. In this sense, we only lack the technology to test this apparent truth that contains us. Perhaps Leonardo is wrong. Of course, he cannot be blamed. Or maybe our theoretical physicists are missing a few nuts and bolts in their brains. Time will tell. What irony! Image by Gordon Johnson on Pixabay