[ It's a rickety thing, so Mako reaches up and curls fingers around Manabu's wrist, letting himself be half-hauled out of the hole onto the deck. Zuko trills her thanks as he clambers onto the half-frozen surface. The air is somehow damp and crisp all at once, full of the kind of cold clean smell that scours your nostrils as you breathe. ]

No, I'm with you. We don't even know if there are other Sleepers out there. It'd be stupid to leave a city that's clearly adapted to us when we're still trying to learn how it all works, but... I want to know. You were mostly on the trains, right? Did you... I don't know. Get a good sense of how big other planets were? Is there a way to tell?