HERON (10 C.E.-75 C.E.)
   Hero of Alexandria, also known as Heron of Alexandria. He was an ancient Greek mathematician and engineer who lived in Alexandria, Egypt, during the 1st century AD. Heron made significant contributions to various fields, including mathematics, physics, and engineering. He is best known for his work on mechanics and his treatise "Mechanica," which discusses topics such as the properties of simple machines and the mathematics of levers. Heron also wrote on a wide range of mathematical subjects. He explored geometry, number theory, and arithmetic, and developed methods for calculating areas and volumes. One of his notable works is "Metrica," a compilation of formulas and methods for measuring lengths, areas, and volumes. In addition to his mathematical achievements, Heron is credited with several inventions, such as the aeolipile, a steam-powered device considered to be an early precursor to the steam engine. He also designed various machines, including automatic do...