Ancient Stonehenge mystery solved thanks to particularly dry summer: archaeologists

[packman]

3. This is a surprise to me:

"Archeologists have long argued over whether the ancient monument was once a perfect circle or if it was always, as it is now, an incomplete ring."

I thought it was commonly known that Stoney was a circle. Seems like I read about it being such in grade school and even seeing depictions of it being a circle at one time.