The Revelation Space Collection (revelation space)

by Alastair Reynolds

  Skade stirred her hand through the red substance. The covering had enough adhesion to form a single sticky mass, even in zero gravity. Now and then she felt something harder — a shard of bone machinery — but nothing larger than a thumbnail had remained one piece.

  Tell me what happened.

  [He was near the field focus. The excursion to state two was only momentary, but it was enough to make a difference. Any movement would have been fatal, even an involuntary twitch. Maybe he was already dead before he hit the wall.]

  How fast was he moving?

  [Kilometres per second, easily.]

  It would have been painless, I suppose. Did you feel him hit?

  [Throughout the ship. It was like a small bomb going off.]

  Skade willed her gloves to clean themselves. The residue flowed back on to the wall. She thought of Clavain, wishing that she had some of his tolerance for sights like this. Clavain had seen horrid things during his time as a soldier, enough that he had developed the necessary mental armour to cope. With one or two exceptions, Skade had fought all her battles at a distance. [Skade… ?]

  Her crest must have reflected her discomposure. Don’t worry about me. Just try to find out what went wrong, and make sure it doesn’t happen ain.

  [And the testing programme?]

  The programme continues, of course. Now get this mess cleaned up.

  Felka floated in another chamber of her quiet residential spar. Where tools had been tethered to her waist earlier many small metal cages now orbited her, clacking gently against each other when she moved. Each cage contained a clutch of white mice, scratching and sniffing at their constraints. Felka paid them no attention; they had not been caged for long, they were well fed and shortly they would all enjoy a sort of freedom.

  She squinted into gloom. The only source of light was the faint radiance of the adjacent room, separated from this one by a twisting throat of highly polished wood the colour of burned caramel. She found the UV lamp attached to one wall and flicked it on.

  One side of the chamber — Felka had never bothered deciding which way was up — was sheeted over with bottle-green glass. Behind the glass was something that at first glance resembled a convoluted wooden plumbing system, a palimpsest of pipes and channels, gaskets and valves and pumps. Diagonals and doglegs of wood spanned the maze, bridging different regions, their function initially unclear. The pipes and channels had only three wooden sides, with the glass forming the fourth wall so that whatever flowed or scurried along them would be visible.

  Felka had already introduced about a dozen mice to the system via one-way doors near the edge of the glass. They had quickly taken divergent paths at the first few junctions and were now metres apart, nosing through their own regions of the labyrinth. The lack of gravity did not bother them at all; they could obtain enough traction against the wood to scamper freely in any direction. The more experienced mice, in fact, eventually learned the art of coasting down pipes, minimising the frictional area they exposed to the wood or glass. But they seldom learned that trick until they had been in the maze for several hours and through several reward cycles.

  Felka reached for one of the cages attached to her waist, flipping open the catch so that the contents — three white mice — spilled into the maze. Away they went, momentarily gleeful to have escaped the metal prisons.

  Felka waited. Sooner or later one of the mice would run into a trapdoor or flap that was connected to a delicate system of springloaded wooden levers. When the mouse pushed past the flap, the movement caused the levers to shift. The movement would often be transmitted across the maze, causing a shutter to open or close one or two metres away from the original trigger point. Another mouse, working its way through a remote stretch of the maze, might suddenly find its way blocked where previously it had been clear. Or the mouse might be forced to make a decision where previously none had been required, anxieties of possibility momentarily clouding its tiny rodent brain. It was quite probable that the choices of the second mouse would activate another trigger system, causing a distant reconfiguration of another part of the maze. Floating in the middle, Felka would watch it happen, the wood shifting through endless permutations, running a blind program whose agents were the mice themselves. It was fascinating enough to watch, after a fashion.

  But Felka was easily bored. The maze, for her, was just the start of things. She would run the maze in semi-darkness, with the UV lamp burning. The mice had genes that expressed a set of proteins that caused them to fluoresce under ultraviolet illumination. She could see them clearly through the glass, moving smudges of bright purple. Felka watched them with ardent, but perceptibly waning, fascination.

  The maze was entirely her invention. She had designed it and fashioned its wooden mechanisms herself. She had even tinkered with the mice to make them glow, though that had been the easy bit compared with all the fettling and filing that had been needed to get the traps and levers to work properly. For a while she even thought it had been worth it.

  One of the few things that could still interest Felka was emergence. On Diadem, the first world they had visited after leaving Mars in the very first near-light ship, Clavain, Galiana and she had studied a vast crystalline organism which took years to express anything resembling a single ‘thought’. Its synaptic messengers were mindless black worms, burrowing through a shifting neural network of capillary ice channels threading an ageless glacier.

  Clavain and Galiana had wrenched her away from the proper study of the Diadem glacier, and she had never quite forgiven them for it. Ever since, she had been drawn to similar systems, anything in which complexity emerged in an unpredictable fashion from simple elements. She had assembled countless simulations in software, but had never convinced herself that she was really capturing the essence of the problem. If complexity sprung from her systems — and it often had — she could never quite shake the sense that she had unwittingly built it in from the outset. The mice were a different approach. She had discarded the digital and embraced the analogue.

  The first machine she had tried building had run on water. She had been inspired by details of a prototype that she had discovered in the Mother Nest’s cybernetics archive. Centuries earlier, long before the Transenlightenment, someone had made an analogue computer which was designed to model the flow of money within an economy. The machine was all glass retorts and valves and delicately balanced see-saws. Tinted fluids represented different market pressures and financial parameters: interest rates, inflation, trade deficits. The machine sloshed and gurgled, computing ferociously difficult integral equations by the power of applied fluid mechanics.

  It had enchanted her. She had remade the prototype, adding a few sly refinements of her own. But though the machine had provided some amusement, she had seen only glimpses of emergent behaviour. The machine was too ruthlessly deterministic to throw up any genuine surprises.

  Hence the mice. They were random agents, chaos on legs. She had concocted the new machine to exploit them, using their unpredictable scurrying to nudge it from state to state. The complex systems of levers and switches, trapdoors and junctions ensured that the maze was constantly mutating, squirming through phase-space — the mind-wrenching higher-dimensional mathematical space of all possible configurations that the maze could be in. There were attractors in that phase-space, like planets and stars dimpling a sheet of space-time. When the maze fell towards one of them it would often go into a kind of orbit, oscillating around one state until something, either a build-up of instability or an external kick, sent it careering elsewhere. Usually all that was needed was to tip a new mouse into the maze.

  Occasionally, the maze would fall towards an attractor that caused the mice to be rewarded with more than the usual amount of food. She had been curious as to whether the mice — acting blindly, unable to knowingly co-operate with each other — would nonetheless find a way to steer the maze into the vicinity of one of those attractors. That, if it happened, would surely be a sign of em
ergence.

  It had happened, once. But that batch of mice had never repeated the trick since. Felka had tipped more mice into the system, but they had only clogged up the maze, locking it near another attractor where nothing very interesting happened.

  She had not completely given up on it. There were still subtleties of the maze that she did not fully understand, and until she did it would not begin to bore her. But at the back of her mind the fear was already there. She knew, beyond any doubt, that the maze could not fascinate her for very much longer.

  The maze clicked and clunked, like a grandfather clock winding up to strike the hour. She heard the shutterlike clicking of doors opening and closing. The details of the maze were difficult to see behind the glass, but the flow of the mice betrayed its shifting geometry well enough.

  ‘Felka?’

  A man forced his way through the connecting throat. He floated into the room, arresting his drift with a press of fingertips against polished wood. She could see his face faintly. His bald skull was not quite the right shape. It seemed even odder in the gloom, like an elongated grey egg. She stared at it, knowing that, by rights, she should always have been able to associate that face with Remontoire. But had six or seven men of about the same physiological age entered the room, possessing the same childlike or neotenous facial features, she would not have been able to pick Remontoire out from them. It was only the fact that he had visited her recently that made her so certain it was him.

  ‘Hello, Remontoire.’

  ‘Could we have some light, please? Or shall we talk in the other chamber?’

  ‘Here will do nicely. I’m in the middle of running an experiment.’

  He glanced at the glass wall. ‘Will light spoil it?’

  ‘No, but then I wouldn’t be able to see the mice, would I?’

  ‘I suppose not,’ Remontoire said thoughtfully. ‘Clavain’s with me. He’ll be here in a moment.’

  ‘Oh.’ She fumbled one of the lanterns on. Turquoise light wavered uncertainly and then settled down.

  She studied Remontoire’s expression, doing her best to read it. Even now that she knew his identity, it was not as if his face had become a model of clarity. Its text remained hazy, full of shifting ambiguities. Even reading the commonest of expressions required an intense effort of will, like picking out constellations in a sprinkling of faint stars. Now and then, admittedly, there were occasions when her odd neural machinery managed to grasp patterns that normal people missed entirely. But for the most part she could never trust her own judgement when it came to faces.

  She bore this in mind when she looked at Remontoire’s face, deciding, provisionally, that he looked concerned. ‘Why isn’t he here now?’

  ‘He wanted to give us time to discuss Closed Council matters.’

  ‘Does he know anything about what happened in the chamber today?’

  ‘Nothing.’

  Felka drifted to the top of the maze and popped another mouse into the entrance, hoping to unblock a stalemate in the lower-left quadrant. ‘That’s the way it will have to continue, unless Clavain assents to join. Even then he may be disappointed at what he doesn’t get to know.’

  ‘I understand why you wouldn’t want him to know about Exordium, ’ Remontoire said.

  ‘What exactly is that supposed to mean?’

  ‘You went against Galiana’s wishes, didn’t you? After what she discovered on Mars she discontinued Exordium. Yet when you returned from deep space — when she was still out there — you happily participated.’

  ‘You’ve become quite an expert all of a sudden, Remontoire.’

  ‘It’s all there in the Mother Nest’s archives, if you know where to look. The fact that the experiments took place isn’t much of a secret at all.’ Remontoire paused, watching the maze with mild interest. ‘Of course, what actually happened in Exordium — why Galiana called it off — that’s another matter entirely. There’s no mention in the archives of any messages from the future. What was so disturbing about those messages that their very existence couldn’t be acknowledged?’

  ‘You’re just as curious as I was.’

  ‘Of course. But was it just curiosity that made you go against her wishes, Felka? Or was there something more? An instinct to rebel against your own mother, perhaps?’

  Felka held back her anger. ‘She wasn’t my mother, Remontoire. We shared some genetic material. That’s all we had in common. And no, it wasn’t rebellion either. I was looking for something else to engage my mind. Exordium was supposed to be about a new state of consciousness.’

  ‘So you didn’t know about the messages either?’

  ‘I had heard rumours, but I didn’t believe them. The easiest way to find out for myself seemed to be to participate. But I didn’t start Exordium again. The programme had already been resurrected before our return. Skade wanted me to join it — I think she thought the uniqueness of my mind might be of value to the programme. But I only played a small part in it, and I left almost as soon as I had begun.’

  ‘Why — because it didn’t work the way you’d hoped?’

  ‘No. As a matter of fact it worked very well. It was also the most terrifying thing I’ve ever experienced in my life.’

  He smiled at her for a moment; then his smile slowly vanished.

  ‘Why, exactly?’

  ‘I didn’t believe in the existence of evil before, Remontoire. Now I’m not so certain.’

  He spoke as if he had misheard her. ‘Evil?’

  ‘Yes,’ she said softly.

  Now that the subject had been raised she found herself remembering the smell and texture of the Exordium chamber as if it had been only yesterday, even though she had done all she could to steer her thoughts away from that sterile white room, unwilling to accept what she had learned within it.

  The experiments had been the logical conclusion to the work Galiana had initiated in her earliest days in the Martian labs. She had set out to enhance the human brain, believing that her work could only be for the greater good of humanity. As her model, Galiana used the development of the digital computer from its simple, slow infancy. Her first step had been to increase the computational power and speed of the human mind, just as the early computer engineers had traded clockwork for electromechanical switches; switches for valves; valves for transistors; transistors for microscopic solid-state devices; solid-state devices for quantum-level processing gates which hovered on the fuzzy edge of the Heisenberg uncertainty principle. She invaded the brains of her subjects, including herself, with tiny machines that laid down connections between brain cells which exactly paralleled those already in place, but which were capable of transmitting nerve signals much more rapidly. With the normal neurotransmitter and nerve-signal events inhibited by drugs or more machines, Galiana’s secondary loom took over neural processing. The subjective effect was normal consciousness, but at an accelerated rate. It was as if the brain had been supercharged, able to process thoughts at a rate ten or fifteen times faster than an unaugmented mind. There were problems, enough to ensure that accelerated consciousness could not usually be sustained for more than a few seconds, but in most respects the experiments had been successful. Someone in the accelerated state could watch an apple fall from a table and compose a commemorative haiku before it reached the ground. They could watch the depressor and elevator muscles flex and twist in a hummingbird’s wing, or marvel at the crownlike impact pattern caused by a splashing drop of milk. They also, needless to say, made excellent soldiers.

  So Galiana had moved on to the next phase. The early computer engineers had discovered that certain classes of problem were best tackled by armies of computers locked together in parallel, sharing data between nodes. Galiana pursued this aim with her neurally enhanced subjects, establishing data-corridors between their minds. She allowed them to share memories, experiences, even the processing of certain mental tasks such as pattern recognition.

  It was this experiment running amok — jumping uncontrolled
from mind to mind, subverting neural machines which were already in place — that led to the event known as the Transenlightenment and, not inconsequentially, to the first war against the Conjoiners. The Coalition for Neural Purity had wiped out Galiana’s allies, forcing her back into the seclusion of a small fortified huddle of labs tucked inside the Great Wall of Mars.

  It was there, in 2190, that she had met Clavain for the first time, when he had been her prisoner. It was there that Felka had been born, a few years later. And it was there that Galiana pushed on to the third phase of her experimentation. Still following the model of the early computer engineers, she now wished to explore what could be gained from a quantum-mechanical approach.

  The computer engineers in the late twentieth and early twenty-first centuries — barely out of the clockwork era, as far as Galiana was concerned — had used quantum principles to crack problems that would otherwise have been insoluble, such as the task of finding the prime factors of very large numbers. A conventional computer, even an army of conventional computers sharing the task, stood no chance of being able to find the prime factors before the effective end of the universe. And yet with the right equipment — an ungainly lash-up of prisms, lenses, lasers and optical processors on a lab bench — it was possible to do it in a few milliseconds.

  There had been fierce debate as to exactly what was happening, but not that the primes were being found. The simplest explanation, which Galiana had never seen any reason to doubt, was that the quantum computers were sharing the task between infinite copies of themselves, spread across parallel universes. It was conceptually staggering, but it was the only reasonable explanation. And it was not something they had plucked out of thin air to justify a perplexing result; the idea of parallel worlds had long been at least one conceptual underpinning of quantum theory.

  And so Galiana had tried to do something similar with human minds. The Exordium chamber was a device for coupling one or more augmented brains to a coherent quantum system: a bar of magnetically suspended rubidium that was being continually pumped into cycles of quantum coherence and collapse. During each episode of coherence the bar was in a state of superposition with infinite counterparts of itself, and it was at this moment that a neural coupling was attempted. The act itself always forced the bar to collapse down to one macroscopic state, but the collapse was not instantaneous. There was a moment when some of the bar’s coherence bled back into the linked minds, putting them into weak superposition with their own parallel-world counterparts.