The Little Pink Nub That Almost Didn't Happen: How a Chemist's Blunder Quietly Revolutionized the Classroom
Before the rubber eraser existed, mistakes made in pencil were permanent — scraped away with bread crumbs or just left to haunt the page. The fix came from a London laboratory in the 1770s, and it happened almost entirely by accident. What followed was a quiet revolution that changed how students learned, how professionals worked, and how society thought about failure itself.