Researchers at the University of Leicester have unravelled a 2,700 year old mystery concerning The Oracle of Delphi -- by consulting an ancient farmer's manual. The researchers from the School of Archaeology and Ancient History sought to explain how people from across Greece came to consult with the Oracle... on a particular day of the year even though there was no common calendar... celestial signs observed by farmers could also have determined the rituals associated with Apollo Delphinios. Postgraduate student Alun Salt said: ..."I was playing around with a planisphere while suffering from insomnia. This is when I noticed that...