the.com/gunpowder

the alchemists' immortality experiment that accidentally made everyone a lot more mortal

means An explosive mixture of saltpetre (potassium nitrate), charcoal, and sulfur that burns rapidly to propel bullets and shells or to blast rock.

from A plain English compound — 'gun' plus 'powder' — first used when the substance arrived in medieval Europe in granular, powdery form. The deeper history points east: it was invented in China, where Taoist alchemists chasing an elixir of life stumbled instead on a flammable powder they called huoyao, literally 'fire medicine' or 'fire drug.' The 'medicine' part is no accident — it really did begin as a botched immortality recipe. The know-how then travelled westward along trade and conquest routes, and English simply named the imported marvel for what it did and what it looked like.

origin
Chinese monks sought eternal life, found explosions
recipe
saltpeter, charcoal, sulfur in deadly proportion
first use
firecrackers and fireworks before weapons
name
black powder for its dark gritty look
legacy
ended the age of castle walls
for instance

battle of crecy — 1346 english vs french, first major european battle where cannons were used

siege of constantinople — 1453 ottoman cannons breached byzantine walls, ended eastern roman empire

golden age of piracy — 1650-1730 caribbean, cannons and gunpowder weapons enabled pirate ships

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