Nikola Tesla
Nikola Tesla was a Serbian-born and later naturalized American inventor, electrical engineer, mechanical engineer, physicist, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system. He was a polyglot, speaking eight languages: Serbo-Croatian, Czech, English, French, German, Hungarian, Italian, and Latin.
Tesla is known for his high-voltage, high-frequency power experiments in New York and Colorado Springs which included patented devices and theoretical work used in the invention of radio
communication, for his X-ray experiments, and for his ill-fated attempt at intercontinental wireless transmission in his unfinished Wardenclyffe Tower project.
Photographic Memory: Tesla read many works, memorizing complete books, and supposedly possessed a photographic memory. Just by hearing the name of an item, he would be able to envision it in realistic detail. Tesla would visualize an invention in his mind with extreme precision, including all dimensions, before moving to the construction stage, a technique sometimes known as picture thinking. He typically did not make drawings by hand but worked from memory.
Marriage: Tesla never married, however towards the end of his life, he told a reporter, "Sometimes I feel that by not marrying, I made too great a sacrifice to my work..." There have been numerous accounts of women vying for Tesla's affection, even some madly in love with him.[citation needed] Tesla, though polite and soft-spoken, did not have any known relationships.
Radio Controlled Boad: In 1898, Tesla demonstrated a radio-controlled boat—which he dubbed "teleautomaton"—to the public during an electrical exhibition at Madison Square Garden. The crowd that witnessed the demonstration made outrageous claims about the workings of the boat: everything from magic to telepathy to being piloted by a trained monkey hidden inside.
Tesla's theories on the possibility of the transmission by radio waves go back as far as lectures and demonstrations in 1893 in St. Louis.
Differences with Edison: When Tesla was working for Thomas Edison. In 1885, Tesla claimed that he could redesign Edison's inefficient motor and generators, making an improvement in both service and economy. According to Tesla, Edison remarked, "There's fifty thousand dollars in it for you—if you can do it"—this has been noted as an odd statement from an Edison whose company was stingy with pay and who did not have that sort of cash on hand. After months of work, Tesla fulfilled the task and inquired about payment. Edison, claiming that he was only joking, replied, "Tesla, you don't understand our American humor." Instead, Edison offered a US$10 a week raise over Tesla's US$18 per week salary; Tesla refused the offer and immediately resigned.
X-RAY: Starting in 1894, Tesla began investigating what he referred to as radiant energy of "invisible" kinds that he had noticed damaged film in his lab in previous experiments (later identified as "Roentgen rays" or "X-Rays").
(X-ray of Tesla's hand—one of the earliest x-ray photographs)
Wireless Electric Conductivity: At his Colorado lab, Tesla proved that the earth was a conductor. He produced artificial lightning (with discharges consisting of millions of volts and up to 135 feet long).Thunder from the released energy was heard 15 miles away in Cripple Creek, Colorado.
(An experiment in Colorado Springs. This bank of lights is receiving power by means of electrodynamic induction from an oscillator 100 feet (30 m) from the bulbs)
(Multiple exposure publicity picture of Tesla sitting in his Colorado Springs laboratory with his "Magnifying transmitter" generating millions of volts and producing 7-metre (23 ft) long arcs.)
Tesla Oscillator: Tesla invented a steam-powered mechanical oscillator—Tesla's oscillator. While experimenting with mechanical oscillators at his Houston Street lab, Tesla allegedly generated a resonance of several buildings. As the speed grew, it is said that the machine oscillated at the resonance frequency of his own building and, belatedly realizing the danger, he was forced to use a sledge hammer to terminate the experiment, just as the police arrived.
(Tesla Oscillator)
Radar Units: In August 1917, Tesla first established the principles of frequency and power level for the first primitive radar units.
Peculiar Affliction: He suffered a peculiar affliction in which blinding flashes of light would appear before his eyes, often accompanied by visions. Often, the visions were linked to a word or idea he might have come across; at other times they would provide the solution to a particular problem he had encountered. Beginning in his childhood, Tesla had frequent flashbacks to events that had happened previously in his life.
Tesla Thought Camera: Tesla was working on a Thought Camera. Which will capture the thoughts to photographs and Images.
(Newspaper representation of Tesla's theoretical invention, the thought camera, which would photograph thoughts. Circa 1933)
Because of his pronouncements and the nature of his work over the years, Tesla gained a reputation in popular culture as the archetypal "mad scientist".
Death: On 7 January 1943, Tesla, 86, died alone in Room 3327 of the New Yorker Hotel. His corpse was later found by maid Alice Monaghan after she had entered Tesla's room, ignoring the "do not disturb" sign that Tesla had placed on his door two days prior to his death. Assistant medical examiner, H.W. Wembly, was called to the scene; after examining the body, he ruled that the cause of death had been coronary thrombosis, and that there had been no suspicious circumstances.
In 1960, in honor of Tesla, the General Conference on Weights and Measures for the International System of Units dedicated the term "tesla" to the SI unit measure for magnetic field strength.
Nikola Tesla’s Signature 
A Mad scientist who made discovery in so many branches of science.
