We all watched #KatyPerry become an actual firework last night at the #SuperBowl halftime show. This got us thinking. What are fireworks anyway and how do they work? Click the link in our bio to see how we break it down. #halftimeshow #science #fireworks #katyperrysharks #firework #ifls #iflscience #howdoesitwork #infographic #sciencefacts