When the conditions are right, the wildfire’s rapidly rising plumes of hot smoke and air cool to form a cloud, known as a pyrocumulonimbus or “pyroCBs”. NASA scientists have referred to them as the ...

Every year between September and December, Lubna Dada makes clouds. Dada, an atmospheric scientist, convenes with dozens of her colleagues to run experiments in a 7,000-gallon stainless steel chamber ...