Science Fiction Story: There was no life on the asteroid, but the miles of rock-hewn corridors through which the earth party wandered left no doubt about the purpose of the asteroid. It was a mighty fortress, stocked with weapons of destruction beyond man's power to understand. And yet there was no life here, nor had there been for untold centuries. What race had built this stronghold? What unimaginable power were they defending against? Why was it abandoned? There was no answer, all was dead. But--not quite all.