Researchers learned that the clouds form when ice crystals condense on meteor smoke — tiny particles ... thought it was a mistake — some kind of color artifact appearing in the images.

HORRY COUNTY, S.C. (WMBF) - Horry County Fire Rescue said a large debris pile fire was the cause of a visible smoke cloud on Sunday. HCFR said crews were called just before 3 p.m. to the 1800 ...