Do things repeat themselves? Does the world feel like an ever-turning merry- go-round that seems to be going in circles? Most people in the modern world believe in linear time. They think there is a past they can look back at and remember, as well as a future they can look forward to and try to predict but never fully know until it finally arrives. We are often told that we are evolving, that things are changing, and indeed there does seem to be increasing change and modernization, at least ...