nothing happens. But if the ship generates an artificial gravity 'pulse' which warps space still further at the displacement point, then it experiences an instantaneous transition to the next displacement point, in the vicinity of another star."
"Then," DiFalco breathed, "you're saying you can travel faster than light?"
"Of course not," Varien snapped. "For a material object to exceed the velocity of light is not merely impossible . . . it is a mathematical absurdity! What I am describing is, to repeat myself, an instantaneous transposition without crossing the intervening realspace distance, possible only at certain locations determined by the gravitational patterns—the 'shape,' if you will—of space. So, for example, it is possible to transit from Tareil"—he aimed a wandlike instrument at one of the golden star-symbols, from which four of the blue bands radiated, and a bright white dot appeared in mid-air beside it—"to this star system." The cursor, as DiFalco decided to think of it, flashed along one of the blue light-bridges to another sun. "One then proceeds via normal space to another of the second star's displacement points, and transits to this star . . . and then this one . . . and finally to the one you know as Alpha Centauri." He held the cursor steady at the indicated star.
Kurganov leaned forward raptly. "So you came a thousand light-years in only the time it took to travel between the various displacement points in these star systems. But," he continued, perplexed, "Alpha Centauri appears to be a cul-de-sac; where is the further displacement connection that enabled you to come to this system?"
"Well," Varien spoke apologetically, "I'm afraid there isn't any." He raised a forestalling hand as the Russian and the American both tried to talk at once. "As I have indicated, displacement points only occur under rare conditions; all of those we know of are at least a hundred light-years apart, usually much more. So the vast majority of stars are without them. Including yours."
"So," DiFalco spoke very slowly and deliberately, "how did you come here?"
"Ah, well, that's another story, which will also provide the answer to the related question of why I came here. Attend, please.
"As I mentioned, some time ago I discovered the secret of interstellar travel via displacement points. Subsequently, my planet—called Raehan, by the way—began exploring rapidly." A quick sentence in his tongue, and arrowlike lights moved illustratively from Tareil along three of the four spokes of blue light extending from it, through star after golden star. "Too rapidly, in fact. Permit me a digression on the history of Raehan.
"Five of your centuries ago, Raehan was almost as advanced as it is now, following two centuries of explosive technological development accompanied by constantly escalating war and social disintegration. At that point, what was left of our people came collectively and spontaneously to the conclusion that change in general must be halted to allow civilization to recover and unify. Over the centuries, there was much refinement but virtually no innovation. Finally, in my parents' time, the strictures began to give way; the chance discovery of artificial gravity set unstoppable changes in motion. I imagine our exuberant and headlong exploration through one displacement point after another, without pausing to consolidate, was partly a release of impulses too long pent up. Also, we could imagine no danger in the stars—we were firmly convinced, on the basis of our own history, that any civilization advanced enough to constitute a potential threat must surely have given up military aggression in order to survive.
"We were wrong."
He spoke a command, jarringly harsh for the language of Raehan, and the star-diagram vanished, to be replaced by something that brought the two Earthmen to their feet in horror.
"That," Varien stated somberly, "is a life-sized image of a Korvaasha. One of our exploration