Crop circles are widely believed to be either, messages or marks left by extraterrestrials or UFO’s, or a complete hoax. They began to gain popularity in the 1970’s and became a media sensation in the 1980’s. The crop circles that were made in the 70’s and 80’s were just simple circles
As the years went by and this phenomena became more and more popular The circles went from simple circles to ornate geometrically perfect designs. Were aliens getting smarter or figuring out for themselves ways to make more ornate spiraling circles? Or were the people making the circles just getting better at making them? It is very possible to make a crop circle if you know what you’re doing, take The Circlemakers for instance. The Circlemakers literally make crop circles for events, companies like GM, and even cereal brands.
Although it is proven that even some of the most famous circles are faked, in my opinion, some crop circles are the result of extraterrestrials. Some are just too vast and too intricate for humans to do. Beyond that, in some circles there have been such things as electronic failures and anomalies, even to where your cell phone stops receiving signal inside the circle but you can reach your arm outside of the circle to receive full signal. The ball of light phenomena is also something closely related to crop circles. The basic idea of balls of light are that they appear around crop circles and have no concrete explanation.
Of course like any other paranormal phenomena we don’t deal with absolutes. It’s for you to decide wether you believe or not.