If you've ever seen a three-wheeled contraption like the Polaris Slingshot zoom past you in traffic, chances are you're at least a little bit curious to find out more about this unusual automobile.

You've probably seen one drive past you with lights flashing and music blasting. You may have even driven past a lot full of them with a sign that says "rent me." It ...

The story goes that if you hang around a retirement community in Florida for long enough, you will inevitably see something that isn't quite a car, but isn't quite a motorcycle. What you will be ...