"When I was a student at Cambridge I remember an anthropology professor holding up a picture of a bone with 28 incisions carved in it. ‘This is often considered to be man’s first attempt at a calendar,’ she explained. She paused as we dutifully wrote this down. ‘My question to you is this – what man needs to mark 28 days? I would suggest to you that this is woman’s first attempt at a calendar.’ It was a moment that changed my life. In that second I stopped to question almost everything I had been taught about the past. How often had I overlooked women’s contributions? How often had I sped past them as I learned of male achievement and men’s place in the history books? …I knew I needed to look again. History is full of fabulous females who have been systematically ignored, forgotten or simply written out of the records. They’re not all saints, they’re not all geniuses, but they do deserve remembering."