Are Crop Circles Created By UFOs?

Crop circles first became a widely known phenomenon in the 1970s with most discoveries are centered on wheat fields in Britain. Those with a conspiratorial mind are inclined to believe that crop circles are either some sort of mystical communication from aliens or that they are caused by UFOs either landing on or hovering above the wheat. They may believe that common sense suggestions as to the origin of crop circles are, in fact, an attempt by the government to conceal their real meaning. Scientists believe that these particular circles may be caused by eddies in the Earth’s magnetic field or concentrations of electrically charged gas.

Do you believe that scientists can explain the non-hoaxed crop circles or do they really have a deeper extra-terrestrial meaning?