Does a tree make a sound when it falls and no one is there to hear?  As for the metaphysics of that question, I don’t know.  The science says ‘yes’ by the way.  But in any case, a tree does leave an afterimage.  This tree fell many, many years ago and the picture was not intended to show its afterimage, the angle is all wrong.  Yet nevertheless, even decades later, the space where that tree once was remains.  Branches have begun to fill in, but the trees around it were already grown when it fell, and no saplings have filled the hole, and so the image remains.  Consider the tree just to the left of center and the one in the top-right corner and their complete lack of branches on the side of their trunks facing the camera, and facing the old tree.