Cropcirclesinthewheatfieldscoveredwithwheatovernight,whensomeofMaiFuDaocurvedpresentedaregularcircle-shapedpattern.Sincethe17thcentury,Cropcirclestheoriginoftheendlesscontroversy.

　　Thefirstisthatthemagneticfield.Someexpertsbelievethatthemagneticfieldthereisamagicmobilityedgeandgeneratesastreamofcurrent,sothatcrop,"flat"ontheground.U.S.expertsexaminedthemorethan130JeffreyWilson,CropCircles,foundthat90%ofthecyclenearthehigh-voltagewiresareconnectedtransformers,withinaradiusof270metersthereisapool.Astheacceptanceofirrigation,wheatfieldatthebottomofthesoiltoreleasenegativeionswillproduceelectricity,withthehigh-voltagewireconnectedtothetransformerisgeneratedpositivelycharged,negativelychargedandpositivelychargedafterthecollisionwillproduceelectromagneticenergy,whichformacycleofwheatdown.

　　Thesecondisatornado,said.Recordsfromthepointofview,mostoftheseasonCropcirclesappearinthespringandsummer,itwasconsideredchangeablesummerweather,tornadoes,themaincauseofthecycle.ManyCropcirclesappearinthehillsidesormountains67kilometersawayfromtheplace,thisplaceiseasytoformatornado.

　　Thethirdisthatextraterrestrialmanufacture.ManypeoplebelievethatCropCirclesaremostlyevolveovernight,islikelytobeextraterrestrial.

　　4isaheresysaid.SomepeoplebelievethatCropCirclesbehindakindofmysteriouspower,liketheBermudaTrianglethesame.Accordingtothisspeculation,somepeopleputCropcirclesasa"disastertrailer"inordertospreadheresy.

　　Fifth,itisspreadmorewidelytosaythatmansays.Manypeoplebelievethattheso-calledCropCirclesjustsomepeople'smischief.BritishscientistAndrewaftermorethan17yearsofinvestigationandresearchthatCropCircles,80%ofman-made.

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