Thinking about time is an intrinsically human faculty, but that doesn’t mean it's a purely mental invention. Between the immediacy of lived time and the representation of long historical, geological, or cosmological periods, human beings find it difficult to situate and represent chronologies and moments in a precise manner. This book puts such notions into perspective: starting from the measurement of real time, Patrick de Wever guides us through a reconstitution of the Earth's history.