First century A.D.

Greek Inventor and Mathematician

Hero (or Heron) of Alexandria was a prolific writer of mathematical and technical textbooks. His best known works are Pneumatics and Metrica. Credited with the invention of an early form of steam engine, Hero created a number of technical devices, including the odometer, dioptra (surveying tool), and screw press.

Little is known about Hero and his life. In fact, the time during which he lived is subject to debate, with speculation ranging from 150 B.C.to A.D. 250. The most accurate estimate appears to be around A.D. 62. Even less is known about his personal life. Due to the number of books he wrote, and the content of these books, it has been suggested that he was appointed to the Museum or the University of Alexandria, where he probably taught mathematics, physics, pneumonics, and mechanics. Many...