The eighteenth century produced many inventions. People stopped reproducing by hand and started reproducing by machine. The invention of the steamboat caused a network of rivers to spring up. Cyrus McCormick invented the McCormick raper, which did the work of a hundred men. Louis Pasteur discovered a cure for rabbits. Charles Darwin was a naturalist who wrote the Organ of the Species. Madman Curie discovered the radio. And Karl Marx became one of the Marx Brothers