Two questions are explored regarding the still-mysterious photon. First, what is the relationship of the photon to space and time? Space is thought of as containing all physically real entities. That is certainly the case for rest mass objects that require space to exist. But the massless photon is oscillatory energy whose cycles require time to occur. If space is a container for rest mass entities, could time be a container for massless energy entities? Can energy even be an entity? (...) Second, is the photon a unitary object that is both particle and wave and therefore dualistic? It is argued here is that the photon is not unitary; it has two identities, one supporting discrete behavior and the other supporting continuous (wave) behavior. There is photon kinetic energy that is always discrete/localized on arrival; it never splits (on half-silvered mirrors) or diffracts (in pinholes or slits). Then there is the photon’s probability wavefront that is continuous and diffractable. Acknowledging that the photon has two identities explains the photon’s dual nature. And wave-particle duality is central to quantum mechanics. Understanding it leads to new insights into the photon’s constant velocity and its entanglement with another photon. (shrink)