Jet engines are remarkably efficient at high altitudes, where the air is thinner, because they compress incoming air before combustion, optimizing performance. Contrary to intuition, flying higher can be more fuel-efficient than at lower altitudes. Fascinatingly, the concept of engine "bleed air" tapped from the engine's compressor section is used for cabin pressurization and climate control, showcasing the engine's multitasking capabilities. What curious or unexpected aviation insights can you share? Join the conversation with your unique perspective!