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What were some good or interesting theories which turned out to be wrong? : r/Physics

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Science's graveyard is full of elegant, internally consistent theories — and caloric theory's spectacular collapse reveals exactly how overunification can fool even brilliant minds.

Caloric TheoryFalsificationismParadigm ShiftThermodynamics

Theory Briefing

  • Caloric theory treated heat as a physical fluid — a neat model that unified combustion, temperature, and energy under one umbrella.
  • The theory ultimately failed because it conflated three distinct concepts — energy, heat, and entropy — that behave very differently.
  • Energy is conserved across processes, but heat and entropy are not, a distinction caloric theory could never explain away.