Stephen Hawking, full name Stephen William Hawking was born on January 8, 1942, in Oxfordshire, England. He was an English theoretical physicist and cosmologist who was known for his theory about black holes that drew upon both relativity theory and quantum mechanics.
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Nikola Tesla was born on July 10, 1856, in Smiljan, Croatia. He was a Serbian-American inventor, electric and mechanical engineer who invented the Tesla coil which is used in Radio Technology and Alternating Current Electricity. He also discovered the rotating magnetic field that contributed to the design of the modern Alternating-Current machinery. Together with his discovery and invention he also developed the Three-Phased System of electric power transmission.