What is time, really—and why does it seem to flow? In this short essay, Stephen Wolfram explores time not as a coordinate or backdrop but as something generated by the ongoing computation of the universe itself. Drawing on ideas from his Physics Project, he explains how the passage of time—our experience of one moment giving way to the next—arises from the limits of what observers like us can compute. We can't see the future all at once; we have to compute it step by step. With clear explanations and real implications for physics and philosophy alike, On the Nature of Time shows how a computational perspective helps make sense of one of the most familiar and puzzling features of our reality.