I try my best to explain. “You know we live underground on Trask because of the wind, right? It carries microscopic shards of stone. Get enough in your lungs, it’ll kill you.” “So the seals on your den help keep it out?” she supposes. “Right. When you build a new home, your family comes around to make the seals that go around the edges of your door out of peta mud. It’s a whole ceremony, and it’s a gesture of trust. Everybody gets their hands on it.”
