A former Soviet agent says he has found evidence that Joseph Stalin spied on Mao Zedong, among others, by analysing excrement to construct psychological portraits.By the sound of things, it was a top secret and rather smelly experiment. According to Russian newspaper reports, in the 1940s Stalin's secret police had set up a special department to get its hands on people's faeces. The ambitious aim: to analyse samples of foreign leaders' stools. In other words, espionage via excrement. Read more
