Solar power filling all the world's energy needs in 20 years? It's going to happen, according to the man who predicted the collapse of the Soviet Union and the spread of Internet. Inventor and futurist Ray Kurzweil predicts solar technology will advance exponentially much like the development of the modern computer. While solar and wind power currently only supply one percent of world's energy needs, Kurzweil contends there is 10,000 times more sunlight than we need to supply all our energy needs. Here's hoping he's right.