A strange phenomenon that started to appear in fields around Britain mostly around the famous Stonehedge monument in the 70s. But the phenomena has now grown to a world phenomenon and circles have appeared in USA, Sweden an many other countries. Many researchers have tried to solve the phenomena and the theories suggested are numerous: magnetic fields, twisters, hoaxes, alien visitors leaving messages and the most amusing theory is about love crazed hedghogs running wild in the night.