If they could get any story from the captured creature, they might save time and be better off than trying to dig through Hennessy's ship. That was almost certainly spoorless by now. The only possible answer seemed to be that the exploring expedition and Hennessy's rescue group had been overcome by the aliens.
It was an answer, but it left a lot of questions. How could the primitives have gotten to the men inside Hennessy's ship? Why was its fuel dumped? Only men would have known how to do that. And who told these creatures that a space ship's metal finders could be fooled by a little more than a hundred feet of solid rock? They'd buried the ship cunningly, and only the accidental slippage had undone their work.
Maybe there would never be a full answer, but he had to find something—and find it fast. Earth needed every world she could make remotely habitable, or mankind was probably doomed to extinction.
The race had blundered safely through its discovery of atomic weapons into a peace that had lasted two hundred years. It had managed to prevent an interplanetary war with the Venus colonists. It had found a drive that led to the stars, and hadn't even found intelligent life there to be dangerous on the few worlds that had cultures of their own.
But forty years ago, observations from beyond the Solar System had finally proved that the sun was going to go nova.
It wouldn't be much of an explosion, as such things go—but it would render the whole Solar System uninhabitable for millenia. To survive, man had to colonize.
And there were no worlds perfect for him, as Earth had been. The explorers went out in desperation to find what they could; the terraforming teams did what they could. And then the big starships began filling worlds with colonists, carried in deep sleep to conserve space.
Almost eighty worlds. The nearest a four month journey from Earth and four more months back.
In another ten years, the sun would explode, leaving man only on the footholds he was trying to dig among other solar systems. Maybe some of the strange worlds would let men spread his seed again. Maybe none would be spawning grounds for mankind in spite of the efforts. Each was precious as a haven for the race.