Tecnologi By Francisco valverde raya 4000 BCE Hierro 3500 BCE Rueda 3500 BCE Arado 1440 BCE Imprenta 1200 BCE Pólvora 1187 BCE Brujulas 600 BCE Instalaciones comunes 105 BCE Moneda 105 BCE Papel 18 BCE Gafas 11 BCE Herradura
