...read or write in any language— doctors, astronomers, judges, soothsayers, engineers, teachers, imams, rabbis, or priests.  Merchants, cameleers, c... ...gol Army had mastered ways to conquer fortified towns and cities. Captured engineers directed the building and testing of siege machines which then w... ... more likely stemmed from his encounters with sailors who had touched the American continent. In his revealing COD: A Biography of the Fish that ... ...fisherman kept secret their profitable catches of cod on regular trips to American waters. Mongols fostered exchange of ideas and inventions The ... ...its strength in a righteous fight. By Anonymous, from MacKellar’s “The American Printer” 1887 1... ... never occurred to me, but common sense confirms his contention that with engineers and architects ―everything begins with a pencil.‖ Petroski t... ...ry did a host of inventors set in motion the development of devices using electrical power that belong in any listing of Information Technologies. ...