Writing has been invented more than once on our small planet. The Olmecs of MesoAmerica were writing histories in stone by 900 BCE. Chinese characters, probably an independent invention, date from 1200 BCE. The ancient Sumerians of Mesopotamia were writing more than mere accounting records in 3200 BCE. Our writing system derives from Sumerian cuneiforms.… Read More »Writing in the past: the tools of our trade by Anna Castle