"All right, maybe we've got some advanced technological stuff but I don't know nothin' much about that," Mal admitted. "Anyway, flyin' ships and transport vessels are mostly what we got, for travelin' between the planets. And depending on what planet you're on, there are some kinds of flyin' cars. Most of us use land speeders though. They work well enough."

"No, we ain't fixed nothin'," Mal said rather flatly. "Hate to say it, but the fact is, some time ago, the Earth you probably know got used up, was made uninhabitable. There were too many people livin' on it, and all the resources got used up. A new kind of Earth was made, and everyone left the old Earth and went there."