Black smoke poured out of the Sistine Chapel chimney on Wednesday, signalling that no pope had been elected as 133 cardinals opened the secretive, centuries-old ritual to choose a new leader of the Catholic Church. The cardinals participating in the most geographically diverse conclave in the faith’s 2,000-year history took just one round of voting Wednesday evening. After failing to find a winner on the first ballot, they retired for the night and will return to the Sistine Chapel on Thursday morning to try to find a successor to Pope Francis.