Brian Dunning attempts to separate the facts from the fictions of Nikola Tesla’s life:
Did Tesla plan to transmit power world-wide through the sky?
It was his ultimate plan, but the farthest he ever got was the partial construction of his famous tower at Wardenclyffe which was intended for wireless communication across the Atlantic. His worldwide wireless power system was theoretical only, employing the Schumann-Tesla resonance to charge the Earth’s ionosphere such that a simple handheld coil could receive electrical power for free anywhere, and everywhere, in the world. Tesla’s idea was innovative, but innovative idea it remained, as debts mounted and the tower was dismantled before it ever got to be used. Now that the nature of the ionosphere is much better understood, physicists now consider Tesla’s concept unworkable, and no attempts to test it have ever worked.
All sorts of conspiracy theories exist, for example that the HAARP research facility in Alaska is secretly a test of Tesla’s worldwide power grid, or some sort of superweapon based on it. The profound differences between these systems become clear upon doing even the most basic of research.
Full Story: Skeptoid: The Cult of Nikola Tesla (Available as both a podcast and an article)