Olga, who was our first hitchhiker, the first one to stick out her thumb on the wavelength of hydrogen, made it home in two years. At Tyuratam, in Kazakhstan, one gray winter morning, they recorded her return on eigh- teen centimeters of magnetic tape. If a religious man one with a background in film technology had been watching the point in space where her Alyut had vanished two years before, it might have seemed to him that God had butt-spliced footage of empty space with footage of Olga’s ship. She blipped back into our space-time like some amateur’s atrocious special effect. A week later and they might never have reached her in time; Earth would have spun on its way and left her drifting toward the sun. Fifty-three hours after her return, a nervous volunteer named Kurtz, wearing an armored work suit, climbed through the Alyut’s hatch. He was an East German specialist in space medicine, and American cigarettes were his secret vice; he wanted one very badly as he negotiated the air lock, wedged his way past a rectangular mass of airscrubber core, and chinned his helmet lights. The Alyut, even after two years, seemed to be full of breathable air. In the twin beams from the massive helmet, he saw tiny globules of blood and vomit swinging slowly past, swirling in his wake, as he edged the bulky suit out of the crawlway and entered the com- mand module. Then he found her. She was drifting above the navigational display, naked, cramped in a rigid fetal knot. Her eyes were open, but fixed on something Kurtz would never see. Her fists were bloody, clenched like stone, and her brown hair, loose now, drifted around her face like seaweed. Very slowly, very carefully, he swung himself across the white keyboards of the command console and secured his suit to the navigational display. She’d gone after the ship’s communications ~gear with her bare hands, he decided. He deactivated the work suit’s right claw; it unfolded automatically, like two pairs of vice- grip pliers pretending they were a flower. He extended his hand, still sealed in a pressurized gray surgical glove. Then, as gently as he could, he pried open the fingers of her left hand. Nothing. But when he opened her right fist, something spun free and tumbled in slow motion a few centimeters from the synthetic quartz of his faceplate. It looked like a seashell. Olga came home, but she never came back to life behind those blue eyes. They tried, of course, but the more they tried, the more tenuous she became, and, in their hunger to know, they spread her thinner and thin- ner until she came, in her martyrdom, to fill whole libraries with frozen aisles of precious relics. No saint was ever pared so fine; at the Plesetsk laboratories alone, she was represented by more than two million tissue slides, racked and numbered in the subbasement of a bomb-proof biological complex. They had better luck with the seashell. Exobiology suddenly found itself standing on unnervingly solid ground: one and seven-tenths grams of highly organized biological information, definitely extraterrestrial. Ol- ga’s seashell generated an entire subbranch of the science, devoted exclusively to the study of . . . Olga’s seashell. The initial findings on the shell made two things clear. It was the product of no known terrestrial biosphere, and as there were no other known biospheres in the solar system, it had come from another star. Olga had either visited the place of its origin or come into contact, however distantly, with something that was, or had once been, capable of making the trip. They sent a Major Grosz out to the Tovyevski Coordinates in a specially fitted Alyut 9. Another ship followed him. He was on the last of his twenty hydrogen flares when his ship vanished. They recorded his depar- ture and waited. Two hundred thirty-four days later he returned. In the meantime they had probed the area constantly, desperate for anything that might become the specific anomaly, the irritant around which a theory might grow. There was nothing: only Grosz’s ship, tum- bling out of control. He committed suicide before they could reach him, the Highway’s second victim. When the towed the Alyut back to Tsiolkovsky, they found that the elaborate recording gear was blank. All of it was in perfect working order; none of it had functioned. Grosz was flash-frozen and put on the first shuttle down to Plesetsk, where bulldozers were already excavating for a new subbasement. Three years later, the morning after they lost their seventh cosmonaut, a telephone rang in Moscow. The caller introduced himself. He was the director of the Central Intelligence Agency of the United States of America. He was authorized, he said, to make a certain offer. Under certain very specific conditions, the Soviet Union might avail itself of the best minds in Western psychiatry. It was the understanding of his agency, he continued, that such help might currently be very wel- come. His Russian was excellent.