In his book “The Medusa and the Snail,” science writer Lewis Thomas said that the word “error” developed from a root meaning “to wander about, looking for something.” That’s why he liked Darwin’s idea that error is a driving force in evolution. “The capacity to blunder slightly is the real marvel of DNA,” said Thomas. “Without this special attribute, we would still be anaerobic bacteria and there would be no music.” —Rob Brezsny’s Free Will Astrology