Jules Gabriel Verne was a French author who pioneered the genre of science-fiction. He is best known for his novels Journey to the Center of the Earth (1864), Twenty Thousand Leagues Under the Sea (1870), and Around the World in Eighty Days (1873). Verne wrote about space, air, and underwater travel before navigable aircraft and practical submarines were invented, and before any means of space travel had been devised. He is the second most translated author of all time, behind Agatha Christie. His prominent novels have been made into films. Verne, along with H. G. Wells, is often referred to as the "Father of Science Fiction".