Many a late-night conversation has focused on the subject of parallel universes, usually without reaching a conclusion. Where do you land?

There’s something romantic — and a little terrifying — about the idea of infinite worlds containing infinite versions of ourselves; following the concept to its logical conclusion suggests that anything you can imagine exists somewhere out there in the universe(s). There’s no direct evidence of it, however, and some people may find the idea too far-fetched to truly believe in. That won’t stop us from wondering about it when we gaze at the night sky.