The Swiss Spaghetti Harvest
The respected BBC news show Panorama
ran a segment revealing that thanks to a very mild winter and the virtual elimination of the dreaded spaghetti weevil, Swiss farmers were enjoying a bumper spaghetti crop. It accompanied this announcement with footage of Swiss peasants pulling strands of spaghetti down from trees.
Huge numbers of viewers were taken in. Many called the BBC wanting to know how they could grow their own spaghetti tree. To this the BBC diplomatically replied that they should "place a sprig of spaghetti in a tin of tomato sauce and hope for the best."
The Swiss Spaghetti Harvest is one of the most famous, and most popular, April Fool hoaxes of all time.