The History Inn on Instagram: "Fire pistons, once common in Southeast Asia, are a fire-starting tool that uses nothing but air and pressure to ignite tinder. By rapidly plunging a piston into a narrow cylinder, the air inside compresses so quickly that it heats to over 400°C—hot enough to ignite materials like char cloth instantly. This principle, called adiabatic compression, is the same one that powers diesel engines today. Indigenous groups mastered this centuries before the industrial world