Crop circle

  A crop circle is a sizable pattern created by the flattening of a crop such as wheat，barley , rye , maize , or rapeseed.     Formations usually appear overnight, although some are reported to have appeared during the day. Various theories have been put forth ranging from natural phenomena and man-made hoaxes, to the paranormal and even animals. While it is not known how all crop circles are formed, the most likely theory is that all of them were made by hoaxers.     

 Some cereologists have suggested that crop circles are the result of extraordinary meteorological phenomena ranging from freak tornadoes to ball lightning, but there is no evidence of any crop circle being created by any of these causes.    Since becoming the focus of widespread media attention in the 1980s, crop circles have become the subject of speculation by various paranormal , ufological , and anomalistic investigators ranging from proposals that they were created by bizarre meteorological phenomena to messages from extraterrestrial beings .

(Sketch of a "spaceship" creating crop circles,sent to UK Ministry of Defence circa 1998. ) 

             

  

Researchers of crop circles have linked modern crop circles to old folkloric tales, to support the claim that they are not artificially produced. Circle crops are culture-dependant: they appear mostly in Western countries and Japan, but they don't appear at all in Muslim countries.     There are many mysteries in this world, and many of them still cannot find the answer. 

  I think this is one of the reason to make people fascinated with the truth of the explore nature.