He looked ahead, at the red spark of Mars, the world of refuge. It would be hard living on Mars, yes, for all the millions of men. But there were other worlds in space, and they had the knowledge and the ships. He thought they would go farther than Mars, much farther. He thought that they could not guess now, how far.

But someday, they or their children would come back to old Earth again. Of that, he was very sure.