Look at them, slumped across the seating in various states of collapse, and consider what is actually happening: several hundred bodies at 37 degrees Celsius, each radiating roughly a hundred watts of waste heat into a hall the airline keeps deliberately cool, so that the entire terminal is a slow furnace of exhaled warmth fighting the air handling, a thermodynamic argument nobody notices they are having.
The coffee is the interesting part. Each cup holds water heated to near boiling, which means those molecules have been kicked into a frenzy, moving faster than a bullet, colliding billions of times a second. The moment it leaves the machine it begins losing that energy to the room, and it cannot win.
Heat only ever flows one direction, from the hot thing to the cold hall, never back, and this single stubborn rule is the reason the whole night feels like it is running downhill. Nothing here will spontaneously reheat. That is why 5am is 5am.
The floor-to-ceiling glass is doing something quietly spectacular: holding back the sky. Outside, the air presses in at fourteen pounds per square inch, the accumulated weight of the entire atmosphere, and that pane simply stands there against it while a jet, a hundred tonnes of aluminium and kerosene, waits to be lifted off the planet by nothing but air moving faster over a curved wing than under it.
And the aluminium in that fuselage, the iron in the seat frames, the calcium in the bones of every exhausted traveler folded over a suitcase: all of it was forged inside dying stars and flung across the galaxy long before Earth existed.
This entire dim terminal is stellar debris, briefly warm, waiting for a 6am flight.