4:44 Fairy rings are all around Wyoming, so it's possible you have seen them without noticing - they look like rings of extra-green grass or mushrooms. The circles can be explained by science, but, as their name suggests, are the subject of many folklore stories. How that came about starts with a story about dancing. Sabina Magliocco is an anthropology professor at the University of British Columbia. She said dancing used to look quite different than it does today. "At one time, circle dancing was actually the most prevalent form of folk dance all over Europe," she said. "People would dance in a circle, usually at festivals and celebrations."