By Cat DiStasio
The dream of flight has entranced humans for centuries, and modern innovators won't quit until the flying cars of sci-fi movies are realized. Although today's traffic jams still happen on the ground level, plenty of engineers have their eyes and minds on the sky. It's fascinating, if not intoxicating, to dream of the day when we might one day be able to take to the skies in a vehicle of our own, but until then, we can revel in prototypes built by dreamers with the capital to turn their high-flying ideas into a reality. Where we're going, we don't need roads.