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Nikola Tesla (10 July 1856 – 7 January 1943) was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to...

Nelson Rolihlahla Mandela (18 July 1918 – 5 December 2013) was a South African anti-apartheid revolutionary, political leader and philanthropist who served as President of...

Joe Biden (born November 20, 1942) is an American politician and the president-elect of the United States. Joe Biden is a “healthy, vigorous, 77-year-old male...