Has someone explained crop circles?

Question

Has someone explained crop circles?

Answer 1

Yes.  They're hoaxes.

Answer 2

They are hoaxes created by very clever and artistic people to confuse the gullible into believing that there are aliens driving space ships through wheat fields.

Answer 3

Crop circles have been a mystery to many modern Earthlings since they first started appearing in England in 1978. They're often called a hoax, but that's a misnomer. Crop circles are real (they're in the dictionary, after all). But their origins are much less exotic than many people originally thought. And it's easy to understand why. They looked so perfect, seemingly too perfect for a person to make. They appeared swiftly and mysteriously, emerging overnight in fields of corn, barley, and other crops. What humans could do this without getting caught? Thus, crop circles were a mystery. Some wondered if a vortex of wind or plasma could have caused it. Others wondered if they were the result of something called a "mind-energy field." Or perhaps military experiments, chemicals, or buried ruins. The possible causes bandied about are many, most exciting among them the idea that they were extraterrestrial in origin. The movie Signs, which I quite enjoyed, does nothing to dispel this myth. In Signs, aliens somehow managed to cross the universe, but needed to make crop-circle navigational marks so they could find their way around big, bad Earth. Whatever.