Do you dream in color or black and white? Here’s what the science says. The tendency to dream in gray scale or color may be influenced in part by age and when people grew up.

Black smoke indicates that votes have been cast, but no candidate has received the two-thirds majority required to be elected pope. White smoke means that a new pope has been selected.

It wasn't clear whether grey smoke was closer to black or white, for example. By the 1970s, the straw method had been abandoned in favor of more controllable chemical mixtures .

Black holes may form and grow quietly inside stars due to the accumulation of dark matter, potentially explaining the existence of near- and sub-solar-mass black holes. In white dwarfs, the ...