By the summer of 1990 the phenomenon of crop circles was attracting large amounts of media attention. A group of researchers, who described themselves as 'cerealogists,' set out to solve the mystery of the circles' formation once and for all. They camped out on a hillside in Wiltshire with an array of heat, light and sound detectors, in the hope of recording the creation of a crop circle.

On the second night, July 25, the Operation appeared to meet with success. The monitoring equipment recorded flashing orange lights in the adjacent field. The next morning the lead researcher excitedly told the waiting media that two large circles with parallel lines running through them had formed during the night... More→

A crop circle appeared in a field of rye located outside of Johannesburg, South Africa during the first week of February 1993.

The South African media speculated excitedly about whether it was the work of a UFO. Many newspapers and TV and radio shows discussed it, fanning interest in the incident. Popular curiosity grew until February 14, when a small detail was pointed out that had previously escaped almost everyone's notice: the circle formed a BMW logo.

The circle turned out to be the work of the Hunt Lascaris ad agency, working on behalf of BMW. TV commercials soon followed, showing aerial views of the circle accompanied by the tag-line, "Perhaps there is intelligent life out there after all." Hunt Lascaris estimated that it received over $1 million worth of free publicity from the stunt. More→

In July 1997 a crop circle resembling the logo of a popular band, the Sneaker Pimps, appeared in Warwickshire, England. This band was playing in the nearby Phoenix music festival. No one ever took credit for the formation. Cerealogists Andy Thomas and Mike Leigh have suggested that "the thought patterns of those at the festival had somehow coalesced to create it in ways which experiments had shown possible." An alternative (more plausible) explanation is that it was created either by a fan, or by a public-relations agent trying to publicize the band.