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Mysterious Calif. crop circle plowed over

Julie Belanger / 111th Aerial Ph

Crop circles appeared in a field in Salinas, Calif., but no one knows where they came from.

A mysterious crop circle in the Salinas Valley in central California attracted so much attention that the land-owner hired armed security guards to keep people off the property.

But the crop circle is gone. On Tuesday, the landlord ordered a crew to plow over the entire field.

Aerial photographer Julie Belanger spotted the crop circle as she was flying over the valley Monday morning.

"It was beautiful. Quite beautiful," Belanger told NBC affiliate KSBW. "I believe it's possible that aliens exist, but I don't know if they would bother making a crop circle to give us a message."

Braille experts said in the center of the design is a braille inscription that has the number 192 over-and-over.

Why that number? That is still a mystery.

— NBC Bay Area