Curiosity is the fundamental drive that urges us to explore, whether that means investigating our back yard or deep space.
It is a sign of good times for the commercial space industry that this curiosity has become so addictive. The public, after all, loves space. Witness the crowds that gathered to watch the Transit of Venus, despite unforgiving weather conditions in many places.
Or witness the second-wave entrepreneurs (some might call them publicity hounds or worse) entering the commercial space race.
As a species, we're good at spotting a winning idea. That means that while the first wave of explorers blaze the trail, the next people on the scene are the opportunists. That means NewSpace, buoyed by the success of SpaceX's Dragon mission, is a hot ticket. What will follow is merely a pattern of human nature, and that is in so many ways a sign of progress.