he believed we could harness hydroelectric, geothermal and solar energy to power the world for free. In theory we can and we do already to some extent except people like making money so it's not really free. He also believed he contacted aliens.
Perpetual motion is never going to be possible ever because of everything we know already. Tesla certainly didn't believe a perpetual motion machine was possible because he had a good understanding of physics.
Where can I learn more about time crystals? what is that a quote from?
RE: Is The Oil Industry Suppressing Alternative Fuels? We can run an engine on tap water!