Nikola Tesla is a well known Serbian-American engineer, physicist, and inventor who helped contribute to the development of the alternating-current electrical system. Which is still a popularly used electrical system. He was born in what is known today as Croatia. He later moved to the United States in 1884. Tesla also shortly worked with Thomas Edison before parting ways. Edison later became his chief rival. He made many breakthroughs in uses of electrical power and created AC generation and transmission technology. Even though he was well known and well respected, he was never able to earn financial success from his inventions. Nikola Tesla was born in what is now known as Smiljan Croatia on July 10, 1856. At the time, it was part of the Austro-Hungarian Empire. Tesla grew up with his parents and four other siblings, one who died when he was seven years old. The death shocked him and paved the way for his lifelong mental illness. His father was an Orthodox priest and writer and his mother managed the family farm and invented small appliances for their house in her free time. At the Technical University of Graz Nikola Tesla studied math and physics. And at the University of Prague Tesla studied philosophy. At age 28 Tesla decided to move to America. He arrived in New York in 1884. “In 1884 Tesla arrived in the United States with little more than the clothes on his back and a letter of introduction to famed inventor and business mogul Thomas Edison, whose DC-based electrical works were fast becoming the standard in the country.” (Biography.com) Tesla was then hired by Thomas Edison, and the two worked beside each other to improve Edison’s inventions. The two parted ways a couple months later due to their different ideas and personalities. Nikola Tesla contributed many great things to the world of science. “In the 1890s Tesla invented electric oscillators, meters, improved lights and the high-voltage transformer known as the Tesla coil.” (History.com) These being just a few things that he did in his lifetime. He also tested and assisted in the development of short-range radio communication, he experimented with x-rays, and controlled a radio piloted boat. Because of Tesla’s AC motor, energy was able to be transferred far away from where it was generated. With the encouragement the from two men that helped fund his research, Tesla built a polyphase induction motor. Nikola Tesla’s discovery and creation of the Tesla Coil paved the way for many modern technology. The coil was used in radios and other devices of communication. The coil was used to pilot a radio controlled boat he invented. Even though Tesla struggled with a mental illness and his obsession with the number 3, he still invented many great things. In conclusion, Nikola Tesla was an odd man who even through struggling with a mental illness, invented many things which have paved the way for much of modern technology. He was delicate during certain parts of his life and near the end he had pretty much gone crazy. However, the mark he has left upon the world won’t be going away anytime soon and is how we have most of our electrical appliances.