Evolution

by Stephen Baxter

  “You fucking dark horse. I never knew. Why you?”

  “Atavistic urges, mate. I think she was responding to my smarter than the average brain.”

  Snowy mulled over that. “So our big brains are good for one thing, then.”

  “Oh, yes. They were always good for that. Probably what they were for in the first place. All the rest was bullshit.”

  “You fucking dark horse.”

  IV

  Snowy followed the ape people.

  He didn’t live as they did. He used his snares to trap game up to the size of pigs and small deer, and used knives and fires and lean-tos for protection and butchery. But he walked where they walked.

  They wandered impressively widely, through the great forests that blanketed southern England, forests that concealed the ruins of cities and cathedrals, palaces and parks. He became concerned if he lost sight of Weena, reassured when he found her again. He grew to know all the individuals in the little group — he gave them names, like Grandpa and Shorty and Doc — and he followed their lives, their triumphs and tragedies, as if he were watching a small soap opera.

  They were frightened of the rats — the big ones, the rat-wolves that seemed to hunt in packs. He found that out quickly.

  He wondered how he must seem to them. They were clearly aware of him, but he didn’t interfere with them or the food they gathered. So they let him be, unremarked. He was like a ghost, he thought, a ghost from a vanished past, haunting these new people.

  After a few months, with the long, long summer of these late times at last drawing to a close, they came to a beach. Snowy thought he was somewhere on the Sussex shore, on Britain’s south coast.

  The hairies did a little foraging at the fringe of the forest, ignoring Snowy as usual.

  Snowy wandered along the beach. The forest washed right down to the shore, as if this were a Robinson Crusoe tropical island, not England at all. He found a place to sit, facing the crashing waves.

  He picked up a handful of sand. It was fine and golden, and ran easily through his fingers. But there were black grains in there, he saw, and some bits of orange and green and blue. The multicolored stuff must be plastic. And the black stuff looked like soot — soot from Rabaul, the killer volcano, or from the fires that had swept the world as everything went to shit.

  It’s all gone, he thought wonderingly. It really has. The sand was a kind of proof. Moon rock and cathedrals and football stadiums, libraries and museums and paintings, highways and cities and shanties, Shakespeare and Mozart and Einstein, Buddha and Mohammed and Jesus, lions and elephants and horses and gorillas and the rest of the menagerie of extinction — all worn away and scattered and ground down, mixed into this sooty sand he trickled through his fingers.

  The hairies were leaving. He could see their slim forms sliding silently into the deeper forest.

  He stood up, brushed the sand off his palms, shifted the pack on his back, and followed them.

  CHAPTER 18

  The Kingdom of the Rats

  East Africa. Circa 30 million years after present.

  I

  The asteroid had once been called Eros.

  Eros had its own miniature geography. Its ground was covered by impact craters, scattered rubble and debris, and strange pools of very fine, bluish dust, electrically charged by the relentless sunlight. Some three times as long as it was wide, it was like Manhattan Island hurled into space.

  Eros was as old as the Devil’s Tail. Like the Chicxulub comet it was a relic of the formation of the solar system itself. But unlike the comet the asteroid had coalesced well within the clockwork of the inner system — inside the orbit of Jupiter, in fact. In the early days there had been mass destruction as the young asteroids, following their careening orbits, had smashed helplessly into each other. Most were shattered into clouds of dust, or thrown into the great maw of Jupiter, or into the crowded and dangerous inner system. The survivors, in their depleted swarms, followed orderly orbits around the brightening sun.

  But even now gravity’s ghostly tug caused the asteroids’ orbits to resonate like plucked strings.

  She surfaced reluctantly into the daylight.

  She had had another bad dream. Her head felt muzzy, her limbs stiff. Through the crude roof of her treetop nest she saw the rustling green of the higher canopy, and slivers of bright blue tropical sky. Like the pallet under her body, the roof was just a pulled-together mass of twigs and leaves and slim branches, hastily constructed in the last hour before darkness, soon to be abandoned.

  She lay on her back, her right arm pillowed under her head, her legs tucked up against her belly. Her naked body was covered with fine golden hair. At fifteen years of age she was in the prime of her life. Stretch marks on her belly and her small dugs showed that she had already given birth. Her eyes, crusted with sleep, were large, black, watchful: the mark of a slow readaptation to nocturnal living. Behind them a shallow brow led to a small, neat brainpan, its modest outline obscured by a thatch of curly dark hair.

  A part of her never slept soundly, no matter how well she constructed her nests. Her dreams were always troubled by the huge spaces beneath her, into which she might fall. Since the treetops were the only safe place for her people to live, this didn’t make sense, but there it was. It was going to take more time yet for people to get used to their return to the trees.

  It didn’t help, of course, that her only child so far had been taken by those spaces beneath her, his grip loosened from her fur by rain, his little body tumbling into the green depths.

  She had never discussed this with anyone. In fact nobody discussed anything anymore. The days of endless talking were long gone, the larynxes and cognitive capacities of a loquacious folk put aside, irrelevant to life in the trees.

  She didn’t even have a name. But perhaps something in her retained a deep memory of vanished, different days. Call her Remembrance.

  She heard a rustling in the layers of vegetation beneath her, a trickle of discarded fruit husks falling through the leaves, the first tentative hooting pants of the males.

  She rolled on to her belly and pressed her face into her bed of twigs. She could just make out the colony itself, a dark, pendulous mass in the deeper layers of the canopy, like a wooden submarine somehow lodged high in the green. All around the colony slim figures were moving, working, bickering. The business of the day was starting. And it didn’t pay to be a late arrival.

  Remembrance stood upright and broke open her nest, like a bird bursting from its egg. With her small head raised to her full meter-tall height above the branch, she peered around at her world.

  Everywhere the forest lapped in great green layers of life. The highest canopy was a roof far above her own elevation. To north, west, and east, beyond the trees, Remembrance could make out a blue, sparkling glimmer. The light off the ocean had always intrigued her. And though she could not make out the southern shore, she had a correct intuition that the ocean continued even there, making a great belt around the land: she knew that she lived on a vast island. But the ocean was another irrelevance, too far away for her to be troubled with.

  This particularly dense pocket of forest had sprouted from a gorge cut deep into the bedrock. Sheltered by walls of hard rock, fed by streams that ran along the base of the gorge, this was a crowded, vibrant place, full of life — though here and there were bare patches cleared by borametz trees and their servants, a new kind of life.

  But the gorge itself wasn’t natural. Long ago blasted out of ancient bedrock, it was the result of human road building. Erosion had taken its toll: When the drainage ditches and culverts were no longer maintained, the cutting slopes had collapsed. But nevertheless a patient geologist could have detected a fine dark layer in the sandstone that had slowly gathered at the bottom of the gorge. The dark layer was metamorphosing bitumen, a stratum still sprinkled here and there with fragments of the vehicles that had once come this way.

  Even now the passing of humans left its mark.

>   A shadow flickered over the leaves that rustled around her, fast-moving, silent, cast by the low sun. Hastily she ducked down, seeking the safety of the green’s cover. It had been a bird, of course. The predators of the upper canopy had already started their day, and it did not do to be too visible.

  With a last glance at the remains of her nest — littered by bits of shit and discarded hair, stained by her urine, soon to be forgotten — she began to clamber down.

  As the tropical day brightened, the people had already spread out through the trees, lithe and graceful, beginning the day’s relentless search for fruit, bark-burrowing insects, and leaf-cupped water.

  Remembrance, still listless, hung back, watching.

  There were males and females alike, some of the women laden with clinging infants. The males also did a great deal of displaying, hooting, aggressive leaping to and fro. Here was something that had not changed down the long years: the structure of primate society was still the same, a flashy male-hierarchy superstructure imposed on top of a network of patient female clans.

  In these middle layers of the canopy the taller trees thrust upward past the crowns of their smaller brethren. In this intermediate place, neither low nor high, the people were relatively safe from threats from above and below. And it was here, surrounded by the tall, slim stripes of the great trees’ trunks, that they had built their colony.

  It was a ball some ten meters across. Its thick wall was made of twigs and dead leaves, crudely crammed together. The leaves had been softened by chewing before being pressed into gaps in the structure. The whole thing was neatly lodged in the crooks of the robust branches of the tree, in which it had been constructed over generations. And it was lived in: A thin stream of shit and piss slid down the tree’s great trunk, sewage trickling out of the openings that pocked the colony’s base.

  This ball of spittle and twigs was the most advanced construction any posthumans were now capable of. But it was the result of instinct, not mind, as empty of conscious planning as a bower bird’s nest or a termite mound.

  Remembrance could see small faces peering out timidly through gaps in the colony’s crude wall. She remembered her time with her own child inside those dank, ill-smelling walls. The colony’s basic purpose was to shelter the most vulnerable from the forest’s predators: at night the prepubescent young, the old and sickly would cram within its walls. But only the smallest infants and their mothers were allowed to stay in its shelter during the day while the rest risked the open spaces to forage.

  And, as stray canopy-filtered rays of sunlight caught the colony, the walls sparkled. Embedded in the packed-together twigs and leaves were bright stones gathered from the forest floor. There were even bits of glass. Across millions of years glass was unstable, becoming opaque as tiny crystals formed within it — but nevertheless these fragments had retained their shapes, bits of windshields or taillights or bottles, now retrieved and gathered to adorn the walls of this shapeless building.

  It looked like decoration, but it was not. The glass and bright stones were meant for defense. Even now predators on these postpeople could be deterred by the remnants of buildings, by glittering stones and shining glass, haunted by deep-buried instincts developed in the time of the most dangerous killers who had ever walked the Earth. So Remembrance’s folk aped the structures of their ancestors, not even capable of imagining what they were imitating.

  Once, of course, the trees had been the domain of primates, where they had been able to roam with little fear of predation. Monkeys and chimpanzees had not needed fortresses of leaf and twig. Times had changed.

  As Remembrance lingered, a young male hissed at her. He had a bizarre white patch of fur on his backside, almost like a rabbit’s. She knew what he was thinking: He suspected she might be after the patch of bark he was working with his mother and siblings. People’s minds were not what their ancestors’ had been, but Remembrance was still capable of working out the beliefs and intentions of others.

  But White-patch’s troop had been weakened today. Since the last time Remembrance had seen them, their elder son had gone. He might have left to seek some other colony, suspended somewhere in the forest’s green depths. Or, of course, he might be dead. The family members themselves showed they were still aware of the lost one’s absence in the way they looked over their shoulders at nobody, or left a space for a big male who never came. But soon their memories would heal over, and the brother would vanish into the unremembering mists of the past, as lost as had been all the children of man since the construction of the last tombstone.

  Remembrance herself would never learn what had become of the other son. This was not an age of information. Nobody told anybody else anything anymore. All she knew for sure was what she saw for herself.

  For Remembrance, though, this was an opportunity. She could probably fight this weakened group for a place on their tree. But her poor sleep had left her feeling brittle, restless. It was a mood that had plagued her since the loss of her child. The child’s death had been more than a year ago, but so sharp was the pain, so vivid was it still in her kaleidoscopic, unstructured mind, that it might have been yesterday. Like all her kind, Remembrance was a creature not of purposeful planning but of impulse. And today her impulse was not to fight these squabbling folk for the privilege of a place on their crowded branch, to peel back a bit of bark in search of grubs.

  She turned away and began to make her way through the tangled levels of trees.

  As she swung, clambered, and leapt her way from branch to branch, she began to feel better. The stiffness quickly worked out of her muscles, and it was as if she were coming fully awake. She even forgot, briefly, the loss of her child. She was still young; her kind often lived beyond twenty-five or even thirty years. And, long after a remote ancestor had crawled, baffled, out of a sewer into the greening daylight, her body was well adapted to her way of life, if not yet the deepest chapels of her mind.

  So, as she worked in a blur of speed through the trees, she felt a kind of joy. Why not? Much had been lost, but that made no difference to Remembrance. Her brief moment in the light was here, now, and was to be cherished. As she soared through the dense twilight of the forest layers, her lips drew back from her teeth, and she laughed out loud. It was a reflex the children of man had never lost — even though, across Earth’s healing face, thirty million summers had flickered and gone.

  Remembrance’s tropical forest was part of a great belt wrapped around the waist of the planet, a belt broken only by oceans and mountains. The forests were luxuriant — although they had taken thousands of years after the cessation of man’s ferocious logging to attain something like their former richness.

  The reassembled world, engulfed by forest, had left little room for the descendants of mankind. And so Remembrance’s ancestors had left the ground and taken once more to the green womb of the canopies. There had already been primates here: monkeys whose ancestors had evaded the starving humans in the final days, survivors of the great extinction event. At first the posthumans were clumsier than the monkeys. But they were still smart, relatively — and they were desperate. Soon they completed the extinction that their forefathers had begun.

  After that they had begun to proliferate. But the pressures that had driven them off the ground continued to pursue them.

  Remembrance knew nothing of this. And yet she carried within her a molecular memory, a continuing unbroken line of genetic inheritance that stretched back to the vanished folk who had carved the mighty roadway out of the rock — and back, back far beyond them, to still more distant times when creatures not unlike Remembrance had clambered in trees not unlike this one.

  She stopped at a branch laden with fat red fruit. She sat squat on the branch and began to feed briskly, shelling the fruit and sucking down the soft contents, letting the drained husks fall into the darkness below. But as she ate she kept her back to the trunk, her gaze darted fearfully around the shadows, and her motions were fast, furtive.

&n
bsp; Despite her watchfulness, she was startled when the first chunk of rind hit her on the back of the head.

  Cowering against the trunk, she looked up. Now she saw that the branches above her were heavy with what looked like fruit: fat, dark, pendulous. But those “fruit” were sprouting arms and legs and heads and glittering eyes, and clever hands that hurled rinds and bits of bark and twig down at her. They had probably lain in wait as she approached, and then just as silently converged on her position. They even threw lumps of warm shit.

  And now the chattering began. It was a screaming, meaningless jabber that filled her head, disorienting her — as was its purpose. She huddled in the crook of the branch, her hands clapped over her ears.

  The Chattering Folk were cousins of Remembrance’s kind. They used to be humans too. But the Chatterers lived differently. They were cooperative hunters. All of them, from barely weaned young upward, would work with a cold, instinctive discipline to bring down any prey, or battle any predator. The strategy worked: Remembrance had seen more than one of her kind fall before this treetop army.

  Despite their different ways of living, up to a couple of million years ago the two kinds of people could still have crossbred, though their offspring would have been infertile. By now that was impossible. It had been a speciation, one of many. To the Chattering Folk, Remembrance was not kin, nothing but a potential threat — or perhaps, a meal.

  She was cut off. There seemed to be a Chatterer on every branch. She could never get past them and reach the sanctuary of another tree. She had only one way off this bare trunk: across the ground itself.

  She didn’t hesitate. Skittering down the trunk — letting herself fall for long distances, trusting on her reflexes to grab at branches and slow her descent — she escaped toward the deeper gloom of the forest floor.