Are crop circles man-made or a genuine mystery. Here's some of the best evidence for a paranormal phenomenon.
NUMBER AND COMPLEXITY
Some researchers contend that crop formations are too numerous and too complex to all have been made by humans. This may be the weakest argument against them being manmade as it naively underestimates the abilities and ingenuity of some people.
PLACEMENT
While most crop circles can be found in readily accessible fields, some are not. Some have been found within restricted areas, according to "Peculiarities of Crop Circles" - "numerous accounts of crop circles appearing inside military installations that are fenced off (quite securely!) from the surrounding area. Most notably in Wiltshire along the Salisbury Plain." This article also points out that several crop circles have been formed away from the farmer's tram lines, which makes it very difficult for the circle makers to hide evidence of their presence.
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