There has been an underground movement in the United States, as well as the rest of the world, that many refer to as free energy or zero point energy physics. The foundation for this science was laid out by Nikola Tesla at the second to last turn of the century.
Since then, there have been numerous scientists and inventors working toward a greater understanding of nature's energy systems. There are many devices from the past to present that exhibit over unity effects (some would deem this perpetual motion), and the inventors have been continually suppressed such as Stanley Meyer who was poisoned during a celebration for his drive across America in a water powered car.
Greed is holding back science, and our future prosperity, while our imagination is opening the doorway to solutions.