"Halloween, celebrated on 31 October, is a holiday steeped in mysticism, history and a little bit of magic. Its roots go back to ancient Celtic traditions, but over the years it has been transformed into an evening of costumes, sweets and creative imagery. However, behind the pumpkins with spooky faces and jocular scares, there is a much richer and more fascinating story..." It's basically what we've all known since we were given candy for walking through the dark in a sheet. Today I'm going to...