The avenues on which the interactions between space and time could bring us are so numerous that it is better first to designate some of them that will not be explored. Thus, we will cover neither the study of the estimation of the arrival time of a moving object at a given point in space, the estimate of when two moving objects should collide (Hecht & Savelsbergh, 2004), nor the spatial/horizontal organization of the representation of time intervals (Frassinetti, Magnani, & Oliveri, 2009). Similarly, the whole Piagetian perspective on the relations between time, space, and speed is not covered in this part (but see Chapter 24).