“Now for the arresting part: by this measure, the golden age of the Egyptian pharaohs—an era that strikes most of us as impossibly remote from our own—took place a scant thirty-five lifetimes ago. Jesus was born about twenty lifetimes ago, and the Renaissance happened seven lifetimes back. A paltry five centenarian lifetimes ago, Henry VIII sat on the English throne. Five! As Magee observed, the number of lives you’d need in order to span the whole of civilization, sixty, was “the number of friends I squeeze into my living room when I have a drinks party.” From this perspective, human history hasn’t unfolded glacially but in the blink of an eye. And it follows, of course, that your own life will have been a minuscule little flicker of near-nothingness in the scheme of things: the merest pinpoint, with two incomprehensibly vast tracts of time, the past and future of the cosmos as a whole, stretching off into the distance on either side.”