I have no answers. The more I look into them, the more questions arise. Look at a catalog of crop circle designs and some of the math behind them would be a good start. Just appreciating the artistic beauty of them is reason enough to do so. Personally the idea of ancient civilizations developing inconceivable concepts of space-time given the age of the universe is much more plausible than Earth being the only planet that fostered an environment for the presence of life.