I've passed by Stonehenge many times but I've never stopped and had a good look, it's always been a bit of a mystery, but now reading this was interesting. TORONTO (Reuters) - Stonehenge is a massive fertility symbol, according to Canadian researchers who believe they have finally cracked the mystery of the ancient monument in southern England. In the arrangement of the stones, the researchers say they have spotted the original design: female genitalia. The theory is laid out in a paper entitled "Stonehenge: a view from medicine" in the July issue of Britain's Journal of the Royal Society of Medicine. "To the builders of the henge, the most critical events in life were birth and death," Anthony Perks, a retired professor of obstetrics and gynecology at the University of British Columbia, wrote in the paper. Viewed from above, Perks suggests Stonehenge's inner bluestone circle represents the labia minora and the giant outer sarsen stone circle is the labia majora. The altar stone is the clitoris and the open center is the birth canal. "Could the outer avenue of Stonehenge...represent the way by which new life entered?" the article wondered, adding that when comparing "the layout of the henge with the anatomy of the human vulva. There is a distinct similarity." There you go, one possible explanation for the riddle of the stones, I hope you all enjoyed todays history lesson, class dismissed.