People look at an art installation named 'Death Counter' by Santiago Sierra presented on a building in London on January 1, 2009. The art work progressively documents the annual number of human deaths worldwide last year and was unveiled at 0:00hrs, 1 January 2009 starting from the number zero. Getty Images logo Getty Images 37 months ago

People look at an art installation named 'Death Counter' by Santiago Sierra presented on a building in London on January 1, 2009. The art work progressively documents the annual number of human deaths worldwide last year and was unveiled at 0:00hrs, 1 January 2009 starting from the number zero.