Might've been aliens James Lawson of rural Milan, Ill., stands on the ladder leading to the cab of his combine in front of a mysterious circle of flattened corn he found in his field while harvesting. The circle is a perfect 46 1/2 feet in diameter and had no evidence of cutting nor any other sign of humans. Lawson hasn't entirely ruled out the possibility that the circle was made by a UFO. But if it was aliens, they apparently weren't corn eaters - no ears were removed from the cornstalks.