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Why hasn't anyone ever seen a person making a crop circle?
Crop circles are found in other parts of the globe, but not many.
Are they a distinctly American version of the crop circles?
In 1990, many more crop circles were reported, with some of the most beautiful shapes.
After their announcement, the two men demonstrated making a crop circle.
Many others have demonstrated how complex crop circles can be created.
Other crop circle enthusiasts said they wanted to question the two men closely.
Rockefeller also became interested in spiritual research and crop circles.
When more crop circles were seen, scientists were called in.
By the end of the 1980s, crop circles were very famous.
In 1999 crop circles were discovered in a field near the town.
Methods of creating a crop circle are now well documented on the Internet.
The first crop circles were seen on small farms.
There are, I hear, people who camp out during the summer, hoping to spot a crop circle being formed.
He funded a study about crop circles in the late 1990s.
The group also finds crop circles in the nearby cornfield.
The Korn logo could also be seen in one of the crop circles.
Tales also mention balls of light many times, but never in relation to crop circles.
Crop circles are sometimes explicable as the result of human pranksters.
By the 1990s, crop circles had become something of a tourist attraction.
The label depicts a scarecrow standing in the middle of a crop circle.
This proved that ordinary people could make crop circles.
But every year, new crop circles are seen.
He said the centre's researchers were analysing 150 crop circles from around the world, which they believe answer the questions.
Obviously the best vehicle for viewing crop circles would be a spaceship.