A BRIEF HISTORY OF TIME

We go about our daily lives, understanding almost nothing of the world. We give little thought to the machinery that generates sunlight that makes life possible, to the gravity that glues us to an Earth that would otherwise send us spinning off into space, or to the atoms of which we’re made, and on whose stability we fundamentally depend. Except for children, who don’t know enough not to ask the important questions, few of us spend much time wondering why nature is the way it is, where the Cosmos came from, or whether it was always there, if time will one day flow backward, and effects precede causes, or whether there are…