Nikola Tesla Secret -

: A mechanical oscillator that Tesla claimed could locate mineral deposits or even cause earthquakes, alleging he once nearly brought down a building in Lower Manhattan with a small version of the device.

: His attempt to create a system for the free, wireless transmission of energy through the Earth. Nikola Tesla Secret

Tesla believed that the "secret of invention" was simple: . : A mechanical oscillator that Tesla claimed could

: A defensive particle beam weapon Tesla claimed to have built and tested, which he believed could end all war by making borders impenetrable. Nikola Tesla Secret