Solar power is an awesome thing. If we can harness all the free energy that comes from the sun efficiently, we will have an unlimited supply of free energy that can be used for all sorts of things from powering our gadgets to running the AC system in our homes. Even Google is getting into the solar power business. One of the more interesting things that solar power is being used for is to power experimental cars. The Purdue Solar Racing team has unveiled its special racing car and the thing is very impressive.