Peter Watts - Firefall

The snake’s head lurched up over the edge of the tray. Glassy, unblinking eyes looked this way and that. The tongue, red-black, black-red, tasted the air.

The animal crawled from the pan.

It wasn’t having an easy time of it. It kept trying to roll and crawl on its belly but it didn’t have a belly, not anymore. The ventral scales that would have pushed it along, the muscles beneath had been sliced apart, every one. And so the creature would manage a half twist every now and then, and fail, and resort to crawling on its back: eyes wide, tongue flicking, insides emptied.

The snake reached the edge of the bench, feebly wavered a moment, dropped into the dust. Brüks’s boot came down on its head. He ground it deep against the rocky soil until there was nothing left but a moist sticky clot in the dirt. The rest of the creature writhed, its muscles jumping to the beat of nerves jammed with noise and no signal. But at least there was nothing left that could possibly please-God feel .

Reptiles were not especially fragile creatures. More than once Brüks had found rattlesnakes on the road hours from the nearest vehicle, spines crushed, fangs shattered, heads reduced to bloody paste—still moving, still crawling for the ditch. The kill sack was supposed to prevent that kind of protracted agony. You turned the animal’s own metabolism against it, let lungs and capillaries carry the poison to every cell of every tissue, bringing a quick and painless and—most of all—a complete death, so that it would not wake up and fucking look at you, and try to escape, an hour after you’d scraped its insides away.

Of course, there were zombies in the world now. Vampires, too, for that matter. But the twenty-first century’s undead were strictly Human. There was no reason anyone would want to build a zombie snake. This had to be another contamination artifact; some accidental genetic hack that shut down the MS receptor sites, maybe triggered a rogue suite of motor commands. Had to be.

Still.

He’d really hoped the ghosts would be easier to handle out here.

There weren’t nearly as many ghosts in the desert, for one thing. For another, none of them were human. Sometimes he wished he could feel half as much for the thousands of people he’d killed.

Of course, basic biology explained that particular double standard as well. He hadn’t had to face any of his human victims, hadn’t looked into their eyes, hadn’t been there when they’d died. The gut was not a long-range organ. Its grasp of culpability degraded exponentially with distance; there’d been so many arcane degrees separating the actions of Daniel Brüks from their consequences that conscience itself entered the realm of pure theory. Besides, he’d hardly acted alone; the guilt diffused across the whole team. And their intentions, at least, had been beyond reproach.

Nobody had blamed them, not out loud, not really. Not at first. You don’t pass judgment on the unwitting hammer used to bash in someone’s skull. Brüks’s work had been perverted by others intent on bloodshed; the guilt was theirs, not his. But those perpetrators remained uncaught and unpunished, and so many had needed closure in the meantime. And the distance between How could they and How could you let them was so much smaller than Brüks had ever imagined.

No charges had been pressed. It wasn’t even enough to revoke his tenure. As it turned out, it was only enough to wear out his welcome on campus.

Nature, though. Nature always welcomed him. She passed no judgments, didn’t care about right or wrong, guilt or innocence. She only cared about what worked and what didn’t. She welcomed everyone with the same egalitarian indifference. You just had to play by her rules, and expect no mercy if things didn’t go your way.

And so Dan Brüks had put in for sabbatical and filed his agenda, and headed into the field. He’d left behind his sampling drones and artificial insects, packed no autonomous tech to rub his nose in the obsolescence of human labor. A few had watched him go, with relief; others kept their eyes on the sky. He left them, too. His colleagues would forgive him, or they wouldn’t. The aliens would return, or they wouldn’t. But Nature would never turn him away. And even in a world where every last sliver of natural habitat was under siege, there was no shortage of deserts. They’d been growing like slow cancer for a hundred years or more.

Daniel Brüks would go into the welcoming desert, and kill whatever he found there.

He opened his eyes to the soft red glow of panicking machinery. A third of the network had just died in his sleep. Five more traps went down as he watched: a booster station, suddenly offlined. Twenty-two beeped plaintively a moment later—proximate heat trace, big, man-size even—and dropped off the map.

Instantly awake, Brüks played the logs. The network was going down from west to east, each dead node another footfall in a growing trail of dark ragged footprints stomping across the valley.

Heading directly for him.

He pulled up the satcam thermals. The remains of the old 380 ran like a thin vein along the northern perimeter, yesterday’s stale sunshine seeping from cracked asphalt. Diaphanous thermals and microclimatic hot spots, dying since nightfall, flickered at the threshold of visibility. Nothing else but the yellow nimbus of his own tent at center stage.

Twenty-one reported sudden warmth, and disappeared.

Cameras lurked here and there along the traplines. Brüks had never found much use for them but they’d come bundled as part of the package. One sat on a booster that happened to be line of sight to number nineteen. He brought it up: StarlAmp painted the nighttime desert in blues and whites, a surrealistic moonscape full of contrast. Brüks panned the view—

—and almost missed it: a slither of motion from stage right, an amplified blur. Something that moved faster than anything Human had any right to. The camera was dead before Nineteen even felt the heat.

The booster went down. Another dozen feeds died in an instant. Brüks barely noticed. He was staring at that last frozen frame, feeling his gut clench and his bowels turn to ice.

Faster than a man, and so much less. And just a little bit colder inside.

The field sensors weren’t sensitive enough to register that difference, of course. To see the truth from heat signatures alone you’d need to look inside the very head of your target, to squint until you could see deltas of maybe a tenth of a degree. You’d look at the hippocampus, and see that it was dark. You’d listen to the prefrontal cortex, and hear that it was silent. And then maybe you’d notice all that extra wiring, the force-grown neural lattices connecting midbrain to motor strip, the high-speed expressways bypassing the anterior cingulate gyrus—and those extra ganglia clinging like tumors to the visual pathways, fishing endlessly for the telltale neural signatures of seek and destroy .

It would be a lot easier to spot those differences in visible light: Just look into the eyes, and see nothing at all looking back. Of course, if it ever got that close you’d be dead already. It wouldn’t leave you time to beg. It wouldn’t even understand your pleas. It would simply kill you, if that’s what it had been told to do, more efficiently than any conscious being because there was nothing left to get in the way: no second thoughts, no pulled punches, not even the basic glucose-sucking awareness of its own existence. It was stripped down to pure reptile, and it was dedicated .

Less than a kilometer away now.

Something inside Daniel Brüks split down the middle. One half clamped its hands over its ears and denied everything— what the fuck why would anyone must be some kind of mistake— but the other remembered the universal human fondness for scapegoats, the thousands who’d died thanks to dumb ol’ Backdoor Brüks, the odds that at least one of those victims might have been survived by next of kin with the resources to set a military-grade zombie on his trail.