The branch of science studying the physical properties and behavior of air, especially at high altitudes and in atmospheric conditions.
From 'aero-' + 'physics.' This became an established scientific discipline in the early 20th century alongside aviation development.
Aerophysics revealed that air gets exponentially thinner as you go up—which is why Mount Everest climbers can't just walk to the edge of space; the atmosphere literally disappears beneath your feet!
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