Crop Circles

Crop circles are large circular depressions or patterns that appear overnight in the middle of grain fields (mostly wheat and corn) when the crop is quite high. The phenomenon has spawned its own science: cereology. Crop circles is also part of the UGM category (Unusual Ground Markings), which also include "tripod marks", saucer nests,burn marks, etc.

Most crop circles have been found in the southeast of England since the early 1980s, but others have been reported in the United States and Europe. Some have been exposed as hoaxes, but others remain unexplained. Crop circles range in diameter from as small as 3 metros (10 feet) to over 100 metros (315 feet). They appear overnight, and no tracks leading up to them are found, suggesting some external force from above is responsible. Visually, the stems are partially flattened, and entangled or intertwined. The plants are all bent and face the same direction, clockwise or counter clockwise. The crops are never damaged, broken, or show signs of forced bending. The plants continue to grow normally throughout the rest of their growing cycle. UFO sightings, moving orange lights, "whooshing" or warbling sounds usually preceed the formations of circles.

For the UFO crowd, the circles are signatures left behind by visiting spaceships. For mother-earth mystics, they're the manifestations of deep waves of natural energy. For psychics, they're the conscious results of remote-viewing experiments. For fringe physicists, they're the tracks of ionized plasma whirlwinds. But the most likely is that the pranksters or circlemakers are human that take fun in building such weird circles. As yet no conclusive evidence has been found for any of these theories.

Source: ufoproofs.blogspot.com