What is the cause?

[Alienationsam]

Just thought i would start this poll as it is a question that i always ask myself.
What is the cause of Crop Circles?
Are they a natural thing? Are they made by visitors from a planet far far away?
Please post your thoughts and vote on the poll.

Sam,

[Alienationsam]

I agree that most are hoax because some even create alien figures in the ground pointing up at the sky which have got to be causes. I think that most are also natural and that a very small percent are actually of ET origin.