In 1980s Southern England, intricate crop circles are appearing overnight, and people are desperate for an explanation. Could humans really create something so complex without anyone spotting them? The truth is out there! Actually, the truth is right here. The problem is getting people to believe it.

For a list of sources, see the show notes at timharford.com

Cautionary Tales is celebrating Halloween with a full month of paranormal themed episodes! If you have a spooky story or a skeptical question, get in touch at tales@pushkin.fm. If you want access to an extra Halloween episode - about the strange world of radio telepathy - alongside plenty of other benefits, check out the Cautionary Club on Patreon.