Monoliths have appeared in Romania, Utah, Pittsburgh and California and they've sparked a bit of a conspiracy storm. Everything has been speculated about from alien intervention to dated marketing strategies.
Art group 'The Most Famous Artist' have claimed responsibility for the monoliths, but speculation still abounds.
Dr Peter Ellerton from the University of Queensland Critical Thinking Project doesn't think the monoliths themselves are particularly interesting, but he's fascinated by the reaction to them. He joins Karyn to discuss what captures the public imagination and how we can be aware of how we're being manipulated.
Photo: Patrick A. Mackie
