this is probably part of like chapter 7 or something but i haven't written lots of earlier parts yet!

"Why didn't it come?" asked Wili. "Why wouldn't the Earth people come?"

"You really haven't studied this in school? Your parent's haven't taught you?" Wili shrugged. Zunzhen shrugged back. “I always thought this was the greatest story ever told. The Tug came three times, at the beginning, bringing settlers and supplies. It was supposed to come on a circuit, every couple of years, bringing new people, and news of Earth and the other worlds.” He smiled, and laughed. “The third time was the last – there’s been no Tug, and no more Earthlings, since then.”

Wili wondered when this could have been taught in class, and how he could have missed it. He was sure the Earthlings must have had fantastic robots. “Why not?” he asked.

Zunzhen walked away from the mural, back to the station entrance, and motioned up the stairs. “Who knows? It’s the greatest mystery of human history, as far as Acan is concerned. We’ll find out someday. We’ll go back, and find out what happened – once we build a Tug of our own. Another thousand years, maybe.” He started to climb the stairs, leaving Wili behind him in the darkness of the station. “Let’s go, kid. I’m late for a meeting.”