The smoke from the twin bombs at the Boston Marathon on Monday contains clues about the explosives used to construct them.

What does the black and white smoke mean during a conclave? Black and white smoke is used to represent the cardinals' decisions each day, as they are sequestered and cannot share this news directly.

During a Papal Conclave, the world will be watching for white or black smoke from the Vatican's chimney. Here's what it means.

The color of that smoke depends on what those particles are made of," Robert Krampf, a science educator who calls himself the Happy Scientist, told CBS News via email.

During a Papal Conclave, the world will be watching for white or black smoke from the Vatican's chimney. Here's what it means.

To understand how smoke from Canadian wildfires is turning skies in many places orange this week, it helps to first ask: Why is the sky usually blue? The scientifically jargony answer: atmospheric ...

There are plenty of trees that add colorful beauty to your outdoor space, but there's one cultivar that adds stunning color and visual texture.

At the end of each voting round, black smoke means a new pope has not yet to be selected, while white smoke indicates a new pope has been chosen.