Scholars such as Renaud Barbara and Bernhard Waldenfels and Regula Giuliani have emphasized time’s central role in Merleau-Ponty’s philosophy, and Michael Kelly has shown how the Phenomenology’s “Temporality” chapter already broaches his later ontological concerns. I deepen our understanding of this temporal–ontological nexus by showing how Merleau-Ponty’s temporal ontology in fact erupts even earlier in the Phenomenology, as an underlying theme that unifies part two, on “The Perceived World,” as leading into the “Temporality” chapter. I do this via a close (...) study of the chapter, “The Thing and the Natural World,” first explicating some profound but easily overlooked points about time implied in Merleau-Ponty’s initial remarks on the constancy of form and size. I then closely analyze his study of color constancy in relation to his central source, David Katz’s The World of Colour, to show how color leads him to conceptualize things as what I call “time-things”—and more generally to conceptualize things, the world, and nature, as being in such a way that temporality is ingredient in their being. This leads to some implications for his temporal ontology. (shrink)