Crop circles are the strange and mysterious patterns that appeared overnight (as they claim it to be) in farmers' fields. They create puzzlement, delight, and intrigue globally. Although found mostly in the United Kingdom, they have spread to other countries around the world in past decades. Many books, blogs, fan groups and even Hollywood movies are inspired by crop circles. Interestingly, researchers who work with these crop circles are known as cereologists. Some people claim that crop circles are the acts of aliens or time-travelers and the designs are intended as their messages! Have you ever seen a crop circle? Would you like to see one?