This is a story about the relationship between some crop circles appeared in the 2001 season in Wiltshire, UK.
It starts with a couple of crop circles created in the Avebury area on the 24th of July.
The first one was “uk _ 2001-07-24 _ 18 silburyhill”:
The second one was “uk _ 2001-07-24 _ 19 beckhampton-a”:
Original image courtesy of Andrea Feliziani
The “18 Silburyhill” formation was created by a crop circle researcher and his team.