Premise: The Magic Roundabout in Swindon, England, was constructed in 1972 and consists of five mini-roundabouts arranged around a sixth central, anticlockwise roundabout. Located near the County Ground, home of Swindon Town F.C., its name comes from the popular children's television series "The Magic Roundabout". In 2009 it was voted the fourth scariest junction in Britain, in a poll by Britannia Rescue.
Hypothesis: The popular children's television series The Magic Roundabout started in 1972.