Nikola Tesla's Death ray

This one actually sounds plausible. Nikola Tesla claimed that free energy was indeed possible, and worked for most of his career to achieve it. The theory claims that he did, in fact, succeed, just before his death in 1943, in discovering the mathematics and mechanics involved, but that the FBI immediately broke into his home and seized all his papers and work, and has never released any of it to the public.The concept of free energy is, in very general terms, the ability to input x amount of energy into a machine, which will output x + 1 amount of energy. This seems to conflict with the law of conservation of energy, which states that energy can neither be created nor destroyed. Tesla believed the law to be incorrect. He invented the Tesla Coil as an attempt to create free energy.If it is possible, free energy could be perfected and result in the entire planet being powered by a single power source, such as a nuclear power plant, and output all the energy anyone could ever need. An infinite supply of energy at our fingertips, all based on electric output. You can see how this would irritate the oil companies.