Discover interviews physicist John Wheeler about the quantum nature of reality. “Wheeler conjectures we are part of a universe that is a work in progress; we are tiny patches of the universe looking at itself – and building itself. It’s not only the future that is still undetermined but the past as well. And by peering back into time, even all the way back to the Big Bang, our present observations select one out of many possible quantum histories for the universe.” (Via Anil Dash.)