The universe is wide almost beyond imagining, and we are a small planet circling an ordinary star. It is hard to look at that and believe we are the only ones here. Somewhere out there, maybe close, maybe very far, something else may be looking back.

This section is about the visitors and the watchers: a radio signal that may have carried a message, a couple taken from a quiet road one night in 1961, the strange leaps in our own history that look like a guiding hand, and the old idea that we have never really been alone. Read them with an open mind, and let yourself wonder.