Crop Circles are extraterrestrial messages to our subconscious minds to elevate our consciousness. They are created by "Caneplas", small globe objects that are used by the ETs to also examine places/objects, people from far away.
Links:
Canepla
index.php/dictionary/kanepla
History Channel. Ancient Aliens: Thousands of Mysterious Crop Circles in Farm Fields
https://youtu.be/pI2c6nBTRSg
Image:
https://en.m.wikipedia.org/wiki/Crop_circle
Jabberocky. Public Domain