What black and white smoke means. After the cardinals' votes are counted, the paper ballots are burned in a stove in the Sistine Chapel. Black smoke emerging from the chimney means the world's 1.4 ...

When the U.S. government began printing paper money in 1861, it used green ink to prevent counterfeiters from reproducing the bills with the period’s black-and-white photography. In 1909, when ...

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Black smoke emerging from the chimney means the world's 1.4 billion Catholics don't yet have a new pope. White smoke means the cardinals have chosen a new leader of the church . Why the Vatican ...