Have you heard of Crop circles?

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recently i read about some strange things called crop circles.Here is whati read:Since at least the early 1970s, and much earlier according to various records, unexplained "crop circles", flattened circular or geometric areas in field crops or other vegetation, have been appearing every year in fields around the world. Initially gaining widespread publicity in England in the late 1980s, they have since appeared in greater numbers in many countries around the world. While most earlier reports are of simple small circles and rings, the phenomenon has "evolved" over the years into a wider variety of several thousand known formations to date, including much larger and increasingly complex geometric patterns, often ranging up to several hundred feet or more in size. They have been found in almost every type of cereal crop and other vegetation, including wheat, barley, canola, oats, flax, canary seed, cattle corn, rice paddies, blueberry plants, wild grass pasture fields and even trees. In many formations, the crop is flattened in complex, flowing spirals and alternating layers, sometimes with elaborate "bird's nests" and other intricate features, with bent or curved, but undamaged plant stalks (not to be confused with natural bending from phototropism). While formations in Canada may be simpler for the most part in terms of shape or design, the ground lay pattern of the flattened crops can sometimes be quite complex, more so than is often thought.Most formations, at least in England, appear during the night, within a maximum time window of about four or five hours of complete darkness (during summer months). Many circles have also appeared during rainy, stormy or moonless nights. In a few cases, simpler circles have reportedly been seen forming, a process which reportedly takes only a matter of seconds according to similar various accounts over many years from eyewitnesses. Have you heard of this things?If you find it interesting do tell me.