Strange formations in fields of wheat and other crops have been appearing since the 1970s.

Are they made by aliens parking their spaceships, or is the explanation rather more down to earth?

Audio Book - https://www.scribd.com/audiobook/402115088/Albert-Jack-s-Ten-Minute-Mysteries-The-World-s-Favorite-Mysteries-Investigated

https://albertjack.co.uk/category/mysterious-world/

Audio Books written & narrated by Albert Jack here - https://albertjack.co.uk/