Place-time is best understood as nature itself. It represents the flow geometry of space as the dynamic inclusion of space in place. It is not the definitive geometry of matter and space in three dimensions nor the space-time geometry of three dimensions plus one time dimension. In flow geometry, natural material bodies and numerical identities are energetic inclusions of zero-dimensional points in infinite space, not static material figures set aside from or conflated with space. Movement of energy and non-movement of space combine to create tangible flow-forms which exist for variable periods of time within particular places, hence place-time.