To produce the dramatic black smoke during the 2013 conclave, technicians burned a mixture of potassium perchlorate, anthracene, and sulfur.

Here's what black and white smoke from the Vatican chimney means when Catholic cardinals are voting on a new pope.

Justin Bieber’s latest Instagram post is making waves, thanks to an unexpected collaboration and a bold visual twist that has everyone talking.

No pope is chosen after first day of Vatican conclave Over the coming days, eyes will search for the billowing white smoke that signals Habemus Papam: “We have a pope.” ...

Dozens of people saw something odd in the sky around sunset on Saturday and took to social media with great wonder about the mysterious cloud-like feature.

Residents in Williamsburg, Virginia, were baffled by a large black smoke ring that appeared in the sky on August 13.

Here's what black and white smoke from the Vatican chimney means when Catholic cardinals are voting on a new pope.

Here's what black and white smoke from the Vatican chimney means when Catholic cardinals are voting on a new pope.

Here's what black and white smoke from the Vatican chimney means when Catholic cardinals are voting on a new pope.