How was the recipe for fireworks discovered?

The recipe for fireworks was discovered in ancient China, around the 9th century, when alchemists experimenting with various chemical mixtures accidentally combined saltpeter (potassium nitrate), sulfur, and charcoal, creating the first forms of gunpowder. This explosive mixture was initially used for military purposes, but its potential for creating colorful displays was soon recognized. Over the centuries, additional ingredients were added to produce different colors and effects, leading to the development of the elaborate fireworks we see today. Fireworks eventually spread to other cultures, evolving into a popular form of celebration worldwide.