The Best Science Fiction and Fantasy of the Year-Volume Three (31 page)

They stopped as soon as they saw the vagrant. One talked into the radio clipped to his vest; the other began to round everyone up and lead us to the edge of the churchyard. And all the while the vagrant stood at the centre of a seething circle of maddened dogs, looking about, clubbed hands held out in a gesture of supplication. A hole yawned redly in his broken white face and shaped hoarse and wordless sounds of distress.

More police came. The road outside the churchyard was blocked off. A helicopter clattered above the tops of the trees. The men in hazmat suits entered the park. One of them carried a rifle. By this time everyone who had been in the park was penned against a police van. The police wouldn't answer our questions and we were speculating in a fairly calm and English way about terrorism. That was the great fear, in the long ago. Ordinary men moving amongst us, armed with explosives and hateful certainty.

We all started when we heard the first shot. The chorus of barks doubled, redoubled. A dog ran pell-mell out of the churchyard gate and a marksman shot it there in the road and the woman who still held the leashes of several dogs cried out. Men in hazmat suits separated us and made us walk one by one through a shower frame they'd assembled on the pavement and made us climb one by one in our wet and stinking clothes into cages in the backs of police vans.

I was in quarantine for a hundred days. When I was released, the world had changed forever. I had watched it change on TV and now I was out in it. Soldiers everywhere on the streets. Security checks and sirens and a constant low-level dread. Lynch mobs. Public hangings and burnings. Ten or twenty menezesings in London alone, each and every day. Quarantined areas cleared and barricaded. Invaders everywhere.

By now, everyone was calling them zombies. We knew that they weren't our own dead come back to walk the Earth, of course, but that's what they most looked like. More and more of them were appearing at random everywhere in the world, and they were growing more and more like us. The first zombies had been only approximations. Barely human in appearance, with a brain and lungs and a heart but little else by way of internal organs, only slabs of muscle that stored enough electrical energy to keep them alive for a day or so. But they were changing. Evolving. Adapting. After only a hundred days, they were almost human. The first had seemed monstrous and pitiful. Now, they looked like dead men walking. Animated showroom dummies. Almost human, but not quite.

After I was released from quarantine, I went back to my trade. Interviewing scientists about the invasion, writing articles. There were dozens of theories, but no real evidence to support any of them. The most popular was that we had been targeted for invasion by aliens from some far star. That the zombies were like the robot probes we had dispatched to other planets and moons in the Solar System, growing ever more sophisticated as they sent back information to their controllers. It made a kind of sense, although it didn't explain why, although they had plainly identified us as the dominant species, their controllers didn't try to contact us. Experiments of varying degrees of cruelty showed that the zombies were intelligent and self-aware, yet they ignored us unless we tried to harm or kill them. Otherwise they simply walked amongst us, and no matter how many were detected and destroyed, there were always more of them.

The most unsettling news came from an old and distinguished physicist, a Nobel laureate, who told me that certain of the fundamental physical constants seemed to be slowly and continuously changing. He had been trying to convey the urgent importance of this to the government but as I discovered when I tried to use my contacts to bring his findings to the attention of ministers and members of parliament and civil servants, the government was too busy dealing with the invasion and the consequences of the invasion.

There was an old and hopeful lie that an alien invasion would cause the nations of Earth to set aside their differences and unite against the common enemy. It didn't happen. Instead, global paranoia and suspicion ratcheted up daily. The zombies were archetypal invaders from within. Hatreds and prejudices that once had been cloaked in diplomatic evasions were now nakedly expressed. Several countries used the invasion as an excuse to attack troublesome minorities or to accuse old enemies of complicity with the zombies. There were genocidal massacres and brush fire wars across the globe. Iran attacked Iraq and Israel with nuclear weapons and what was left of Israel wiped out the capital cities of its neighbours. India attacked Pakistan. China and Russia fought along their long border. The United States invaded Cuba and Venezuela, tried to close its borders with Canada and Mexico, and took sides with China against Russia. And so on, and so on. The zombies didn't have to do anything to destroy us. We were tearing ourselves apart. We grew weaker as we fought each other and the zombies grew stronger by default.

In Britain, everyone under thirty was called up for service in the armed forces. And then everyone under forty was called up too. Three years after my first encounter, I found myself in a troop ship at the tail end of a convoy wallowing through the Bay of Biscay towards the Mediterranean. Huge columns of zombies were straggling out of the Sahara Desert. We were supposed to stop them. Slaughter them. But as we approached the Straits of Gibraltar, someone, it was never clear who, dropped a string of nuclear bombs on zombies massing in Algeria, Tunisia, Libya, and Egypt. On our ships, we saw the flashes of the bombs light the horizon. An hour later we were attacked by the remnants of the Libyan and Egyptian air forces. Half our fleet were sunk; the rest limped home. Britain's government was still intact, more or less, but everyone was in the armed forces now. Defending ourselves from the zombies and from waves of increasingly desperate refugees from the continent. There was a year without summer. Snow in July. Crops failed and despite rationing millions died of starvation and cold. There were biblical plagues of insects and all the old sicknesses came back.

And still the zombies kept appearing.

They looked entirely human now, but it was easy to tell what they were because they weren't starving, or haunted, or mad.

We kept killing them and they kept coming.

They took our cities from us and we fled into the countryside and regrouped and they came after us and we broke into smaller groups and still they came after us.

We tore ourselves apart trying to destroy them. Yet we still didn't understand them. We didn't know where they were coming from, what they were, what they wanted. We grew weaker as they grew stronger.

Do you understand me? I think that you do. Your pulse rate and pupil dilation and skin conductivity all show peaks at the key points of my story. That's good. That means that you might be human.

Listen:

Let me tell you what the distinguished old physicist told me. Let me tell you about the observer effect and Boltzmann brains.

In the nineteenth century, the Austrian physicist Ludwig Boltzmann developed the idea that the universe could have arisen from a random thermal fluctuation. Like a flame popping into existence. An explosion from nowhere. Much later, other physicists suggested that similar random fluctuations could give rise to anything imaginable, including conscious entities in any shape or form: Boltzmann brains. It was one of those contra-intuitive and mostly theoretical ideas that helped cosmologists shape their models of the universe, and how we fit into it. It helped to explain why the universe was hospitable to the inhabitants of an undistinguished planet of an average star in a not very special galaxy in a group of a million such, and that group of galaxies one of millions more. We are typical. Ordinary. And because we are ordinary, our universe is ordinary too, because there is no objective reality beyond that which we observe. Because, according to quantum entanglement, pairs of particles share information about each other's quantum states even when distance and timing means that no signal can pass between them. Because observation is not passive. Because our measurements influence the fundamental laws of the universe. They create reality.

But suppose other observers outnumbered us? What would happen then?

The probability of even one Boltzmann brain appearing in the fourteen billion years of the universe's history is vanishingly small. But perhaps something changed the local quantum field and made it more hospitable to them. Perhaps the density of our own consciousness attracted them, as the mass of a star changes the gravitation field and attracts passing comets. Or perhaps the inhabitants of another universe are interfering with our universe. Perhaps the zombies are their avatars: Boltzmann brains that pop out of the energy field and change our universe to suit their masters simply because they think differently and see things differently.

This was what the old physicist told me, in the long ago. He had evidence, too. Simple experiments that measured slow and continuous changes in the position of the absorption lines of calcium and helium and hydrogen in the sun's spectrum, in standards of mass and distance, and in the speed of light. He believed that the fundamental fabric of the universe was being altered by the presence of the zombies, and that those changes were reaching back into the past and forward into the future, just as a pebble dropped into a pond will send ripples spreading out to either side. Every time he checked the historical records of the positions of those absorption lines, they agreed with his contemporaneous measurements, even though those measurements were continuously changing. We are no longer what we once were, but we are not aware of having changed because our memories have been changed too.

Do you see why this story is important? It is not just a matter of my survival, or even the survival of the human species. It is a matter of the survival of the entire known universe. The zombies have already taken so much from us. The few spies and scouts who have successfully mingled with them and escaped to tell the tale say that they are demolishing and rebuilding our cities. Day and night they ebb and flow through the streets in tidal masses, like army ants or swarming bees, under the flickering auroras of strange energies. They are as unknowable to us as we are to them.

Listen:

This is still our world. That it is still comprehensible to us, that we can still survive in it, suggests that the zombies have not yet won an outright victory. It suggests that the tide can be turned. We have become vagrants scattered across the face of the Earth, and now we must come together and go forward together. But the zombies have become so like us that we can't trust any stranger. We can't trust someone like you, who stumbled out of the wilderness into our sanctuary. That's why you must endure this test. Like mantids or spiders, we must stage fearful courtship rituals before we can accept strangers as our own.

I want you to survive this. I really do. There are not many of us left and you are young. You can have many children. Many little observers.

Listen:

This world can be ours again. It has been many years since the war, and its old beauty is returning. Now that civilisation has been shattered, it has become like Eden again. Tell me: Is a world as wild and clean and beautiful as this not worth saving? Was the sky never so green, or grass never so blue?

Garth Nix was born in 1963 in Melbourne, Australia, and grew up in Canberra. When he turned nineteen he left to drive around the UK in a beat-up Austin with a boot full of books and a Silver-Reed typewriter. Despite a wheel literally falling off the car, he survived to return to Australia and study at the University of Canberra. He has since worked in a bookshop, as a book publicist, a publisher's sales representative, an editor, a literary agent, and as a public relations and marketing consultant. He was also a part-time soldier in the Australian Army Reserve, but now writes full-time.
His first story was published in 1984 and was followed by novels
The Ragwitch
,
Sabriel
,
Shade's Children
,
Lirael
,
Abhorsen
, the six-book YA fantasy series "The Seventh Tower," and most recently the seven-book "The Keys to the Kingdom" series. He lives in Sydney with his wife and their two children.

"Remind me why the pirates won't sink us with cannon fire at long range," said Sir Hereward as he lazed back against the bow of the skiff, his scarlet-sleeved arms trailing far enough over the side to get his twice-folded-back cuffs and hands completely drenched, with occasional splashes going down his neck and back as well. He enjoyed the sensation, for the water in these eastern seas was warm, the swell gentle, and the boat was making a good four or five knots, reaching on a twelve knot breeze.

"For the first part, this skiff formerly belonged to Annim Tel, the pirate's agent in Kerebad," said Mister Fitz. Despite being only three feet, six and a half inches tall and currently lacking even the extra height afforded by his favourite hat, the puppet was easily handling both tiller and main sheet of their small craft. "For the second part, we are both clad in red, the colour favoured by the pirates of this archipelagic trail, so they will account us as brethren until proven otherwise. For the third part, any decent perspective glass will bring close to their view the chest that lies lashed on the thwart there, and they will want to examine it, rather than blow it to smithereens."

"Unless they're drunk, which is highly probable," said Hereward cheerfully. He lifted his arms out of the water and shook his hands, being careful not to wet the tarred canvas bag at his feet that held his small armoury. Given the mission at hand, he had not brought any of his usual, highly identifiable weapons. Instead the bag held a mere four snaphance pistols of quite ordinary though serviceable make, an oiled leather bag of powder, a box of shot, and a blued steel main gauche in a sharkskin scabbard. A sheathed mortuary sword lay across the top of the bag, its half-basket hilt at Hereward's feet.