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Following the death of Professor Hans Rosling - perhaps best described as a kind of international development myth buster – we rebroadcast one of his interviews from the show. In this episode he delivers his Ignorance Test. Hans was a professor of international public health, and started the Ignorance Project to investigate what people know and don’t know about the world. His organisation, Gapminder, uses surveys to ask people simple questions about key-aspects of global development. Most people do badly. Hans asked presenter Ruth Alexander three questions from his Ignorance Test. Can you do any better?

(Photo: Hans Rosling, Statistician, Founder of Gapminder speaks about the impact of growing global population on resources at the ReSource 2012 conference Credit: Matthew Lloyd)