Perhaps inspired by their compatriots in America, some Flat Earth conspiracy theorists in Scotland are attempting to engage motorists in a rather unorthodox manner.
Authorities in the county of Perthshire say that graffiti imploring drivers to research the Flat Earth theory has been found at numerous locations along a major highway that runs through the region.
The most prominent message appears spray-painted on the side of a rather decrepit-looking temporary billboard near the road and calls for people to "Research Flat Earth."
Find out why this ambitious attempt at getting the word out has raised the ire of police and may not be particularly successful at the Coast to Coast AM website.