Artist Ben Wilson uses a bank note to provide scale as he takes a photograph of one of his miniature paintings made on discarded chewing gum on the Millennium Bridge, in London February 28, 2012. Wilson has painted miniature works of art on discarded chewing gum in various parts of London and Europe over the past seven years in an effort to "turn something some people would find disgusting into something artistic and beautiful," he said. He chooses gum splatters with unusual shapes "to allow art to happen in a random way." REUTERS/Finbarr O'Reilly (BRITAIN - Tags: ENTERTAINMENT SOCIETY)