A very good 2015 video episode of Ancient Aliens is called "Circles from the Sky".
Unfortunately, my mp4 file is too large to be downloaded here. And I couldn't find any free links to the video online. The video is about 45 minutes long, including about 10 minutes of speculation that I didn't care for -- otherwise I would rank it as excellent.
These complex geometric designs show up in the morning. No people were seen in the fields at night. No lights were seen in the fields at night. No tracks were left in the fields getting to the designs. Some people reported seeing lighted "orbs" in the sky over the fields at night.
No person, or team. could make such complex and perfect geometric designs at night ... or in daylight, even with a whole day to work on them.
Two old English guys got worldwide publicity claiming they went around the world making the designs in many nations. Total BS -- they were not world travelers. They demonstrated making a relatively simple design for the TV show Ancient Aliens, in daylight. It was an uneven design. The stalks of the plants they bent over with a board were broken by force, using their simple "stomping boards".
Much different were plant stalks from real crop circles. They were examined by physicists at the nearby University of Michigan. The physicists declared that some unknown form of energy stretched/altered the nodes on the plant stalks in a mysterious way they had never seen before, and could not explain. The stalks were not bent over, and broken, with 'stomping boards', like the English hoaxers demonstrated on TV.
