The Year's Best SF 13 # 1995

by Gardner Dozois (ed)

  The great beast heard and slipped close. Kalava took the lead in lowering the shafts. A line around his waist for safety, he sprang over the rail, down onto the broad back. He kept his feet, though the two men who followed him went off into the billows and had to be hauled up. Together they rode the huukin, guiding it between the poles where they could attach the harness.

  “I waited too long,” Kalava admitted. “This would have been easier yesterday. Well, something for you to brag about in the inns at home, nay?” Their mates drew them back aboard. Meanwhile the sails had been furled. Kalava took first watch at the reins. Mightily pulled the huukin, tail and flippers churning foam that the wind snatched away, on into the open, unknown sea.

  3

  Wayfarer woke.

  He had passed the decades of transit shut down. A being such as Alpha would have spent them conscious, its mind perhaps at work on an intellectual artistic creation—to it, no basic distinction—or perhaps replaying an existent piece for contemplation-enjoyment or perhaps in activity too abstract for words to hint at. Wayfarer’s capabilities, though large, were insufficient for that. The hardware and software (again we use myth) of his embodiment were designed principally for interaction with the material universe. In effect, there was nothing for him to do.

  He could not even engage in discourse. The robotic systems of the ship were subtle and powerful but lacked true consciousness; it was unnecessary for them, and distraction or boredom might have posed a hazard. Nor could he converse with entities elsewhere; signals would have taken too long going to and fro. He did spend a while, whole minutes of external time, reliving the life of his Christian Brannock element, studying the personality, accustoming himself to its ways. Thereafter he … went to sleep.

  The ship reactivated him as it crossed what remained of the Oort Cloud. Instantly aware, he coupled to instrument after instrument and scanned the Solar System. Although his database summarized Gaia’s reports, he deemed it wise to observe for himself. The eagerness, the bittersweet sense of homecoming, that flickered around his calm logic were Christian Brannock’s. Imagine long-forgotten feelings coming astir in you when you return to a scene of your early childhood.

  Naturally, the ghost in the machine knew that changes had been enormous since his mortal eyes closed forever. The rings of Saturn were tattered and tenuous. Jupiter had gained a showy set of them from the death of a satellite, but its Red Spot faded away ages ago. Mars was moonless, its axis steeply canted.… Higher resolution would have shown scant traces of humanity. From the antimatter plants inside the orbit of Mercury to the comet harvesters beyond Pluto, what was no more needed had been dismantled or left forsaken. Wind, water, chemistry, tectonics, cosmic stones, spalling radiation, nuclear decay, quantum shifts had patiently reclaimed the relics for chaos. Some fossils existed yet, and some eroded fragments aboveground or in space; otherwise all was only in Gaia’s memory.

  No matter. It was toward his old home that the Christian Brannock facet of Wayfarer sped.

  Unaided, he would not have seen much difference from aforetime in the sun. It was slightly larger and noticeably brighter. Human vision would have perceived the light as more white, with the faintest bluish quality. Unprotected skin would have reacted quickly to the increased ultraviolet. The solar wind was stronger, too. But thus far the changes were comparatively minor. This star was still on the main sequence. Planets with greenhouse atmospheres were most affected. Certain minerals on Venus were now molten. Earth—

  The ship hurtled inward, reached its goal, and danced into parking orbit. At close range, Wayfarer looked forth.

  On Luna, the patterns of maria were not quite the same, mountains were worn down farther, and newer craters had wrecked or obliterated older ones. Rubble-filled anomalies showed where ground had collapsed on deserted cities. Essentially, though, the moon was again the same desolation, seared by day and death-cold by night, as before life’s presence. It had receded farther, astronomically no big distance, and this had lengthened Earth’s rotation period by about an hour. However, as yet it circled near enough to stabilize that spin.

  The mother planet offered less to our imaginary eyes. Clouds wrapped it in dazzling white. Watching carefully, you could have seen swirls and bandings, but to a quick glance the cover was well-nigh featureless. Shifting breaks in it gave blue flashes of water, brown flashes of land—nowhere ice or snowfall, nowhere lights after dark; and the radio spectrum seethed voiceless.

  When did the last human foot tread this world? Wayfarer searched his database. The information was not there. Perhaps it was unrecorded, unknown. Perhaps that last flesh had chanced to die alone or chosen to die privately.

  Certainly it was long and long ago. How brief had been the span of Homo sapiens, from flint and fire to machine intelligence! Not that the end had come suddenly or simply. It took several millennia, said the database: time for whole civilizations to rise and fall and leave their mutant descendants. Sometimes population decline had reversed in this or that locality, sometimes nations heeded the vatic utterances of prophets and strove to turn history backward—for a while, a while. But always the trend was ineluctable.

  The clustered memories of Christian Brannock gave rise to a thought in Wayfarer that was as if the man spoke: I saw the beginning. I did not foresee the end. To me this was the magnificent dawn of hope.

  And was I wrong?

  The organic individual is mortal. It can find no way to stave off eventual disintegration; quantum chemistry forbids. Besides, if a man could live for a mere thousand years, the data storage capacity of his brain would be saturated, incapable of holding more. Well before then, he would have been overwhelmed by the geometric increase of correlations, made feebleminded or insane. Nor could he survive the rigors of star travel at any reasonable speed or unearthly environments, in a universe never meant for him.

  But transferred into a suitable inorganic structure, the pattern of neuron and molecular traces and their relationships that is his inner self becomes potentially immortal. The very complexity that allows this makes him continue feeling as well as thinking. If the quality of emotions is changed, it is because his physical organism has become stronger, more sensitive, more intelligent and aware. He will soon lose any wistfulness about his former existence. His new life gives him so much more, a cosmos of sensing and experience, memory and thought, space and time. He can multiply himself, merge and unmerge with others, grow in spirit until he reaches a limit once inconceivable; and after that he can become a part of a mind greater still, and thus grow onward.

  The wonder was, Christian Brannock mused, that any humans whatsoever had held out, clung to the primitive, refused to see that their heritage was no longer of DNA but of psyche.

  And yet—

  The half-formed question faded away. His half-formed personhood rejoined Wayfarer. Gaia was calling from Earth.

  She had, of course, received notification, which arrived several years in advance of the spacecraft. Her manifold instruments, on the planet and out between planets, had detected the approach. For the message she now sent, she chose to employ a modulated neutrino beam. Imagine her saying: “Welcome. Do you need help? I am ready to give any I can.” Imagine this in a voice low and warm.

  Imagine Wayfarer replying, “Thank you, but all’s well. I’ll be down directly, if that suits you.”

  “I do not quite understand why you have come. Has the rapport with me not been adequate?”

  No, Wayfarer refrained from saying. “I will explain later in more detail than the transmission could carry. Essentially, though, the reason is what you were told. We”—he deemphasized rather than excluded her—“wonder if Earth ought to be saved from solar expansion.”

  Her tone cooled a bit. “I have said more than once: No. You can perfect your engineering techniques anywhere else. The situation here is unique. The knowledge to be won by observing the unhampered course of events is unpredictable, but it will be enormous, and I have good cause to believe it will
prove of the highest value.”

  “That may well be. I’ll willingly hear you out, if you care to unfold your thoughts more fully than you have hitherto. But I do want to make my own survey and develop my own recommendations. No reflection on you; we both realize that no one mind can encompass every possibility, every interpretation. Nor can any one mind follow out every ongoing factor in what it observes; and what is overlooked can prove to be the agent of chaotic change. I may notice something that escaped you. Unlikely, granted. After your millions of years here, you very nearly are Earth and the life on it, are you not? But … we … would like an independent opinion.”

  Imagine her laughing. “At least you are polite, Wayfarer. Yes, do come down. I will steer you in.”

  “That won’t be necessary. Your physical centrum is in the arctic region, isn’t it? I can find my way.”

  He sensed steel beneath the mildness: “Best I guide you. You recognize the situation as inherently chaotic. Descending on an arbitrary path, you might seriously perturb certain things in which I am interested. Please.”

  “As you wish,” Wayfarer conceded.

  Robotics took over. The payload module of the spacecraft detached from the drive module, which stayed in orbit. Under its own power but controlled from below, asheen in the harsh spatial sunlight, the cylindroid braked and slanted downward.

  It pierced the cloud deck. Wayfarer scanned eagerly. However, this was no sight-seeing tour. The descent path sacrificed efficiency and made almost straight for a high northern latitude. Sonic-boom thunder trailed.

  He did spy the fringe of a large continent oriented east and west, and saw that those parts were mainly green. Beyond lay a stretch of sea. He thought that he glimpsed something peculiar on it, but passed over too fast, with his attention directed too much ahead, to be sure.

  The circumpolar landmass hove in view. Wayfarer compared maps that Gaia had transmitted. They were like nothing that Christian Brannock remembered. Plate tectonics had slowed, as radioactivity and original heat in the core of Earth declined, but drift, subduction, upthrust still went on.

  He cared more about the life here. Epoch after epoch, Gaia had described its posthuman evolution as she watched. Following the mass extinction of the Paleotechnic, it had regained the abundance and diversity of a Cretaceous or a Tertiary. Everything was different, though, except for a few small survivals. To Wayfarer, as to Alpha and, ultimately, the galactic brain, those accounts seemed somehow, increasingly, incomplete. They did not quite make ecological sense—as of the past hundred thousand years or so. Nor did all of Gaia’s responses to questions.

  Perhaps she was failing to gather full data, perhaps she was misinterpreting, perhaps—It was another reason to send him to her.

  Arctica appeared below the flyer. Imagine her giving names to it and its features. As long as she had lived with them, they had their identities for her. The Coast Range of hills lifted close behind the littoral. Through it cut the Remnant River, which had been greater when rains were more frequent but continued impressive. With its tributaries it drained the intensely verdant Bountiful Valley. On the far side of that, foothills edged the steeply rising Boreal Mountains. Once the highest among them had been snowcapped; now their peaks were naked rock. Streams rushed down the flanks, most of them joining the Remnant somewhere as it flowed through its gorges toward the sea. In a lofty vale gleamed the Rainbowl, the big lake that was its headwaters. Overlooking from the north loomed the mountain Mindhome, its top, the physical centrum of Gaia, lost in cloud cover.

  In a way the scenes were familiar to him. She had sent plenty of full-sensory transmissions, as part of her contribution to universal knowledge and thought. Wayfarer could even recall the geological past, back beyond the epoch when Arctica broke free and drifted north, ramming into land already present and thrusting the Boreals heavenward. He could extrapolate the geological future in comparable detail, until a red giant filling half the sky glared down on an airless globe of stone and sand, which would at last melt. Nevertheless, the reality, the physical being here, smote him more strongly than he had expected. His sensors strained to draw in every datum while his vessel flew needlessly fast to the goal.

  He neared the mountain. Jutting south from the range, it was not the tallest. Brushy forest grew all the way up its sides, lush on the lower slopes, parched on the heights, where many trees were leafless skeletons. That was due to a recent climatic shift, lowering the mean level of clouds, so that a formerly well-watered zone had been suffering a decades-long drought. (Yes, Earth was moving faster toward its doomsday.) Fire must be a constant threat, he thought. But no, Gaia’s agents could quickly put any out, or she might simply ignore it. Though not large, the area she occupied on the summit was paved over and doubtless nothing was vulnerable to heat or smoke.

  He landed. For an instant of planetary time, lengthy for minds that worked at close to light speed, there was communication silence.

  He was again above the cloud deck. It eddied white, the peak rising from it like an island among others, into the level rays of sunset. Overhead arched a violet clarity. A thin wind whittered, cold at this altitude. On a level circle of blue-black surfacing, about a kilometer wide, stood the crowded structures and engines of the centrum.

  A human would have seen an opalescent dome surrounded by towers, some sheer as lances, some intricately lacy; and silver spiderwebs; and lesser things of varied but curiously simple shapes, mobile units waiting to be dispatched on their tasks. Here and there, flyers darted and hovered, most of them as small and exquisite as hummingbirds (if our human had known hummingbirds). To her the scene would have wavered slightly, as if she saw it through rippling water, or it throbbed with quiet energies, or it pulsed in and out of space-time. She would not have sensed the complex of force fields and quantum-mechanical waves, nor the microscopic and submicroscopic entities that were the major part of it.

  Wayfarer perceived otherwise.

  Then: “Again, welcome,” Gaia said.

  “And again, thank you,” Wayfarer replied. “I am glad to be here.”

  They regarded one another, not as bodies—which neither was wearing—but as minds, matrices of memory, individuality, and awareness. Separately he wondered what she thought of him. She was giving him no more of herself than had always gone over the communication lines between the stars. That was: a nodal organism, like Alpha and millions of others, which over the eons had increased its capabilities, while ceaselessly experiencing and thinking; the ages of interaction with Earth and the life on Earth, maybe shaping her soul more deeply than the existence she shared with her own kind; traces of ancient human uploads, but they were not like Christian Brannock, copies of them dispersed across the galaxy, no, these had chosen to stay with the mother world.…

  “I told you I am glad too,” said Gaia regretfully, “but I am not, quite. You question my stewardship.”

  “Not really,” Wayfarer protested. “I hope not ever. We simply wish to know better how you carry it out.”

  “Why, you do know. As with any of us who is established on a planet, high among my activities is to study its complexities, follow its evolution. On this planet that means, above all, the evolution of its life, everything from genetics to ecology. In what way have I failed to share information with my fellows?”

  In many ways, Wayfarer left unspoken. Overtly: “Once we”—here he referred to the galactic brain—“gave close consideration to the matter, we found countless unresolved puzzles. For example—”

  What he set forth was hundreds of examples, ranging over millennia. Let a single case serve. About ten thousand years ago, the big continent south of Arctica had supported a wealth of large grazing animals. Their herds darkened the plains and made loud the woods. Gaia had described them in loving detail, from the lyre-curved horns of one genus to the wind-rustled manes of another. Abruptly, in terms of historical time, she transmitted no more about them. When asked why, she said they had gone extinct. She never explained how.


  To Wayfarer she responded in such haste that he got a distinct impression she realized she had made a mistake. (Remember, this is a myth.) “A variety of causes. Climates became severe as temperatures rose—”

  “I am sorry,” he demurred, “but when analyzed, the meteorological data you supplied show that warming and desiccation cannot yet have been that significant in those particular regions.”

  “How are you so sure?” she retorted. Imagine her angry. “Have any of you lived with Earth for megayears, to know it that well?” Her tone hardened. “I do not myself pretend to full knowledge. A living world is too complex—chaotic. Cannot you appreciate that? I am still seeking comprehension of too many phenomena. In this instance, consider just a small shift in ambient conditions, coupled with new diseases and scores of other factors, most of them subtle. I believe that, combined, they broke a balance of nature. But unless and until I learn more, I will not waste bandwidth in talk about it.”

  “I sympathize with that,” said Wayfarer mildly, hoping for conciliation. “Maybe I can discover or suggest something helpful.”

  “No. You are too ignorant, you are blind, you can only do harm.”

  He stiffened. “We shall see.” Anew he tried for peace. “I did not come in any hostility. I came because here is the fountainhead of us all, and we think of saving it.”

  Her manner calmed likewise. “How would you?”

  “That is one thing I have come to find out—what the best way is, should we proceed.”

  In the beginning, maybe, a screen of planetary dimensions, kept between Earth and sun by an interplay of gravity and electromagnetism, to ward off the fraction of energy that was not wanted. It would only be a temporary expedient, though, possibly not worthwhile. That depended on how long it would take to accomplish the real work. Engines in close orbit around the star, drawing their power from its radiation, might generate currents in its body that carried fresh hydrogen down to the core, thus restoring the nuclear furnace to its olden state. Or they might bleed gas off into space, reducing the mass of the sun, damping its fires but adding billions upon billions of years wherein it scarcely changed any more. That would cause the planets to move outward, a factor that must be taken into account but that would reduce the requirements.