One of the most prolific amazing scientists ever born. His working life extended through the later part of the 19th century and the first half of the 20th century.
Tesla is responsible for inventing the machinery that initiated the global usage of alternating current to power our human world as it is today.
Tesla invented myriads of amazing machines and technologies during his life time.
However, possibly Tesla's greatest discovery and inventions that were never taken up by the world lie in the untapped field of Radiant Energy.