The hum is the first thing I notice now, every time. That low steady drone from the kitchen, the one nobody hears anymore because it never stops. A box, cold on the inside, plugged into a wall, keeping food from turning on us.
Think about what that actually requires. A grid of wires strung across a continent, coal or river water or split atoms somewhere hundreds of miles off, all of it routed down to this one appliance so a carton of milk stays good for another week. We built that. The whole apparatus, just to hold back rot in one family's kitchen.
Up there you learn fast how much machinery it takes to keep a thing alive. Everything is a closed system fighting entropy: the scrubbers pulling carbon out of your own breath, the pumps, the seals, the constant hum you stop hearing until it stops. Earth does it for free, mostly.
Down here the fridge is one of the few places a person can see the effort laid bare. Open the door, feel the cold fall out against your legs, watch the little light come on.
My daughter stands there too long with it open, deciding. I used to tell her she was letting the cold out. Now I just watch her. A kid, warm and undecided, backlit by a machine keeping the frost off her food while ninety percent of everything above her head is a vacuum that would kill her in seconds.
She picks the yogurt. Closes the door. The hum steadies back to normal.
I never tell her any of this.
I just make sure the door shuts all the way.