I don't know the answer. Maybe no one knows. Maybe when you grow up, you'll be the first to find out.

The reappearance of the crescent moon after the new moon; the return of the Sun after a total eclipse, the rising of the Sun in the morning after its troublesome absence at night were noted by people around the world; these phenomena spoke to our ancestors of the possibility of surviving death. Up there in the skies was also a metaphor of immortality.

Where did God come from? If we decide this is an unanswerable question why not save a step and conclude that the origin of the universe is an unanswerable question.

Whatever the reason you're on Mars, I'm glad you're there, and I wish I was with you.

The hole in the ozone layer is a kind of skywriting. At first it seemed to spell out our continuing complacency before a witch's brew of deadly perils. But perhaps it really tells of a newfound talent to work together to protect the global environment.

UFOs: The reliable cases are uninteresting and in the interesting cases are unreliable.

What's the harm of a little mystification? It sure beats boring statistical analyses.