Time is invisible and indescribable, endlessly fascinating and universally compelling. Time is everywhere; thus nowhere. It animates the world, yet nothing survives it. We can only guess how it started, or when it will end. It is our intimate assassin. One thing it lacks, however, except in Greek myth, is a compelling narrative. Natural time—the time of the gods, the sun and the moon—starts in a savage, glorious myth and ends on an Irish railway platform in 1876, when Sandford Fleming missed his train. Originally, Time was embodied in a god, Uranus. He ruled over an immutable world. His children were the seven visible planets. Acting on a prophecy that his life was in danger from one of them, Uranus did the natural thing and slaughtered them all. Their mother, his sister Gaia, was able to hide one son, Kronos. Kronos, upon maturity, did the natural thing—castrated and killed his father. He married his sister, Rhea. When he learned of a plot against him, he cannibalized his children, but for Zeus, whose sleeping body Rhea had replaced with a stone.
