[peacelovinman]

This is certainly convincing, although I suppose it's possible that the stone was in someone's posession before 1996 and the design copied by human circlemakers.

That said, on first look the circle does not look man made.

Why has the story not snowballed? For the same reason that the majority of people do not believe crop circles to be worthy of their attention - conditioned apathy from the media and society in general.