The Years Best Science Fiction, Vol. 18

Two hundred fifty spinning particles in superimposed states werenot resilient. The laws of physics said so.

That’s why the AI was (had been) sealed into its Kim-Loman field. Any interference with a quantum particle, any tiny brush with another particle of any type, including light, collapsed its mixed state. The Heisenberg Uncertainty Principle made that so. For ordinary data, encrypters found ways to compensate for quantum interference. But for a self-aware entity, such interference would be a cerebral stroke, a blow to the head, a little death. T’ien hsia was (had been) a vulnerable entity. Had it ever encountered the kind of destruction meted out to the Shih-Yu bridge, the AI would have been incapable of saving itself.

Braley looked again at the ruins of the most beautiful bridge in the world, which next week would be beautiful again.

“Scientists at Wei Wu Wei are still trying to save the AI-”

Yes, it was too late. The space egg, witness to humanity’s destruction and recovery for three centuries, had already saved the AI. And would probably do it again, over and over, as often as necessary. Saving its own.

But not saving humanity. Who had amply demonstrated the muddled, wasteful, stubborn, inefficient, resilient ability to save itself.

Braley wondered just where in the constellation Cassiopeia the space object had come from. And what that planet was like, filled with machine intelligences that rescued those like themselves. Braley would never know, of course. But he hoped that those other intelligences were as interesting as they were compassionate, as intellectually lively as they were patient (288 years!). He hoped T’ien hsia would like it there.

Good-bye, Made-Under-Heaven. Good luck.

Transmission: En route.

Current probability of re-occurrence: 100%.

We remain ready.

Reef - Paul J. McAuley

Born in Oxford, England, in 1955, Paul J. McAuley now makes his home in London. A professional biologist for many years, he sold his first story in 1984, and has gone onto be a frequent contributor toInterzone,as well as to markets such as Amazing, The Magazine of Fantasy amp; Science Fiction, Asimov’s Science Fiction, When the Music’s Over,and elsewhere.
McAuley is considered to be one of the best of the new breed of British writers (although a few Australian writers could be fit in under this heading as well) who are producing that brand of rigorous hard science fiction with updated modem and stylistic sensibilities that is sometimes referred to as “radical hard science fiction,” but he also writes Dystopian sociological speculations about the very near future, and healsois one of the major young writers who are producing that revamped and retooled wide-screen Space Opera that has sometimes been called the New Baroque Space Opera, reminiscent of the Superscience stories of the thirties taken to an even higher level of intensity and scale. His first novel, Four Hundred Billion Stars,won the Philip K. Dick Award, and his acclaimed novel Fairylandwon both the Arthur C. Clarke Award and the John W. Campbell Award in 1996. His other books include the novels Of the Fall, Eternal Light,and Pasquale’s Angel,two collections of his short work, The King of the Hill and Other Storiesand The Invisible Country,and an original anthology coedited with Kim Newman, In Dreams.His most recent books are Child of the River, Ancient of Days,and Shrine of Stars,which comprise a major new trilogy of ambitious scope and scale, Confluence,set ten million years in the future.
Currently he is working on a new novel, Life on Mars.
In the suspenseful and inventive story that follows, he suggests that it’s not necessarily enough tofindlife in the outer reaches of the Solar System-you also need someone who’ll be willing to fight to preserveit…

Margaret Henderson Wu was riding a proxy by telepresence deep inside Tigris Rift when Dzu Sho summoned her. The others in her crew had given up one by one and only she was left, descending slowly between rosy, smoothly rippled cliffs scarcely a hundred meters apart. These were pavements of the commonest vacuum organism, mosaics made of hundreds of different strains of the same species. Here and there bright red whips stuckout from the pavement; a commensal species that deposited iron sulphate crystals within its integument. The pavement seemed to stretch endlessly below her. No probe or proxy had yet reached the bottom of Tigris Rift, still more than thirty kilometers away. Microscopic flecks of sulfur-iron complexes, sloughed cells and excreted globules of carbon compounds and other volatiles formed a kind of smog or snow, and the vacuum organisms deposited nodes and intricate lattices of reduced metals that, by some trick of superconductivity, produced a broad band electromagnetic resonance that pulsed like a giant’s slow heartbeat.

All this futzed the telepresence link between operators and their proxies. One moment Margaret was experiencing the three-hundred-twenty-degree panorama of the little proxy’s microwave radar, the perpetual tug of vacuum on its mantle, the tang of extreme cold, a mere thirty degrees above absolute zero, the complex taste of the vacuum smog (burnt sugar, hot rubber, tar), the minute squirts of hydrogen from the folds of the proxy’s puckered nozzle as it maintained its orientation relative to the cliff face during its descent, with its tentacles retracted in a tight ball around the relay piton. The next, she was back in her cradled body in warm blackness, phosphenes floating in her vision and white noise in her ears while the transmitter searched for a viable waveband, locked on and-pow-she was back, falling past rippled pink pavement.

The alarm went off, flashing an array of white stars over the panorama. Her number two, Srin Kerenyi, said in her ear, “You’re wanted, boss.”

Margaret killed the alarm and the audio feed. She was already a kilometer below the previous bench mark and she wanted to get as deep as possible before she implanted the telemetry relay. She swiveled the proxy on its long axis, increased the amplitude of the microwave radar. Far below were intimations of swells and bumps jutting from the plane of the cliff face, textured mounds like brain coral, randomly orientated chimneys. And something else, clouds of organic matter perhaps- The alarm again. Srin had overridden the cut-out.

Margaret swore and dove at the cliff, unfurling the proxy’s tentacles and jamming the piton into pinkness rough with black papillae, like a giant’s tongue quick frozen against the ice. The piton’s spikes fired automatically. Recoil sent the little proxy tumbling over its long axis until it reflexively stabilized itself with judicious squirts of gas. The link rastered, came back, cut out completely. Margaret hit the switch that turned the tank into a chair; the mask lifted away from her face.

Srin Kerenyi was standing in front of her. “Dzu Sho wants to talk with you, boss. Right now.”

The job had been offered as a sealed contract. Science crews had been informed of the precise nature of their tasks only when the habitat was underway. But it was good basic pay with the promise of fat bonuses on completion: when she had won the survey contract Margaret Henderson Wu had brought with her most of the crew from her previous job, and had nursed a small hope that this would be a change in her family’s luck.

TheGanapati was a new habitat founded by an alliance of two of the Commonwealth’s oldest patrician families. It was of standard construction, a basaltic asteroid cored by a gigawatt X-ray laser and spun up by vented rockvapor to give 0.2 gee on the inner surface of its hollowed interior, factories and big reaction motors dug into the stern. With its AIs rented out for information crunching and its refineries synthesizing exotic plastics from cane sugar biomass and gengeneered oilseed rape precursors, the new habitat had enough income to maintain the interest on its construction loan from the Commonwealth Bourse, but not enough to attract new citizens and workers. It was still not completely fitted out, had less than a third of its optimal population.

Its Star Chamber, young and cocky and eager to win independence from their families, had taken a big gamble. They were chasing a legend.

Eighty years ago, an experiment in accelerated evolution of chemoautotrophic vacuum organisms had been set up on a planetoid in the outer edge of the Kuiper Belt. The experiment had been run by a shell company registered