Crop circles are areas of plants flattened (usually) into recognizable designs--most often found in fields of growing cereal crops (wheat, barley, oats, rye, etc.). They also occur in corn (maize), grasses, reeds and all sorts of vegetables, and sometimes--according to the scientific plant data available--these more randomly-downed (no discernible pattern) areas contain the same plant abnormalities as have been documented in genuine "geometric" formations. Crop circles are occurring, as best we can tell, all over the world, with the modern "flap" having been first noted in the England in the 1970s--and there is documentation indicating they occurred and were reported as early as the 17th century.

Although some modern crop formations are known to have been mechanically-flattened by people, scientific research
published by the BLT Research Team in the 1990s has established plant & soil abnormalities which cannot be caused by "pranks with planks".
For details call 617 492 0415 or go to http://www.bltresearch.com.

Crop Circles in the USA most often occur on PRIVATE PROPERTY
- Permission from the owner or farmer is required to enter -

2012:

St. Louis, MISSOURI - March 25, 2012  (trees)
Aerial photo submitted showing multiple circles of various sizes and several “flower” designs in a forested area. Investigation revealed that a large-scale, long-term Ozark glade restoration project is underway at the Tyson Research Center by Washington Univ. students. Trees had been cut and areas will then be burned regularly to evaluate effects.

Austin, TEXAS - March 20, 2012   (grasses)
Two areas of chaotically-downed grasses found in yard after thunder-storm during which a nearby tree was struck by lightning.  Metal fence near tree and around yard most likely conducted electric charge from lightning strike to grasses; photos submitted show what looks like charring of one plant, node bending in others.  Not a crop circle.