Samuel Langhorne Clemens was born in a village called "Florida", Missouri, on November 30, 1835, to the father of a merchant from Tennessee called John Marshall Clemens (1798-1847) and a mother named Jane Lambton Clemens (1803-1890), and he was sixth in the order of seven brothers, not exceeding Of them, the childhood stage - unlike Samuel - except for three. When Twain was four years old, his family moved to Hannibal, a Missouri city and port on the Mississippi River. Mark Twain drew inspiration from the fictional Saint Petersburg that appears in his novels The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn from this city. Missouri was at that time one of the states that still followed the system of slavery, which later appeared in the writings of Mark Twain. Twain was fond of science and research, befriended Nikola Tesla and spent a lot of time in Tesla's lab. Twain himself holds three patents. His book "A Connecticut Yankee in King Arthur's Court" tells the story of an American who traveled through time and transferred modern technology to England during the reign of King Arthur. This type of science fiction later became a separate genre in science fiction literature called alternative history. In 1909, Thomas Edison visited Twain at his home in Reading, Connecticut, and filmed him. Some of the footage from that film was used in the short film The Prince and the Pauper, which was produced in 1909.