Bar magnet appeared during the visit to Wiltshire of a scientist from NASA. Avebury Coward, 2000.
Once a respected NASA scientist named Alan Holt on the 20th of July, 2000 year came to Wiltshire to look at crop circles that had already appeared there and, for the sake of joke, asked a question in mind, could these unknown artists help him in his research. Two days later, he was rewarded with the famous image of a bar magnet.
