In 1957, spaghetti was not a common food in Britain. It was mainly available in cans pre-made, so at the time not alot of people knew how pasta was made. The BBC made a three minute report on their show Panorama about a Swiss family harvesting their spaghetti from trees.
It was viewed by over 7 million people and the next day the BBC received hundreds of calls asking for the authenticity of the report or how they could grow their own spaghetti trees.
I remember my mom telling this story as a child and was happy to see it years later. CNN said “the biggest hoax that any reputable news establishment ever pulled” I’d say maybe second best right behind War of Worlds radio broadcast.