Cixin Liu - The Dark Forest

LI WEI: You’re out of your damn mind!

ZHAO XIN: That’s what’s happening. A attacks B; and after B is attacked, but before it explodes, it attacks C; and after C is attacked but before it explodes, it attacks D…. It’s like every warship that was hit attacked the next warship in the row—like an infection, damn it, or a game of pass the parcel, but to the death. It’s insane!

LI WEI: What weapons are they using?

ZHAO XIN: I don’t know. I picked up a projectile in the image, so frickin’ tiny and so frickin’ fast, way the hell faster than your railguns. And incredibly precise. It hit the fuel tanks every single time!

LI WEI: Send me the analysis.

ZHAO XIN: I’ve sent it over, the original data and vector analysis both. Take a look, god damn it!

Ensign Zhao Xin’s analysis, though unconventional, was pretty close to the truth. Li Wei took half a minute to study the information he sent over. In that time, another thirty-nine warships were destroyed.

LI WEI: I’ve noticed something about the speed.

ZHAO XIN: What speed?

LI WEI: The speed of the small projectile. Its speed when it’s launched from each warship is slightly slower. Then it accelerates to thirty kilometers per second during flight. Then it strikes the next warship, and when it launches from that warship prior to the explosion, its speed is a little slower. Then it accelerates….

ZHAO XIN: That doesn’t mean anything….

LI WEI: What I mean is… it’s a little like drag.

ZHAO XIN: Drag? How so?

LI WEI: Every time this projectile passes through a target, the drag slows it down.

ZHAO XIN: I see what you’re doing. I’m not stupid. You said “this projectile” and “passes through a target.”… Is it a single object?

LI WEI: Take a look outside. Another hundred ships have exploded.

This conversation took place not in the modern language of the fleet but in twenty-first-century Mandarin. From the mode of speech, it was obvious that the two were hibernators. There were few hibernators serving in the fleet, and although most of them had awakened while still very young, they still lacked a modern person’s capacity to absorb information, which meant that most of them carried out relatively low-level duties. It was later discovered that the vast majority of officers and soldiers who recovered their senses and good judgment the earliest during the grand destruction were hibernators. These two officers, for instance, despite being at a level that did not even permit them the use of the ship’s advanced systems, were nonetheless able to perform a remarkable piece of analysis.

Zhao Xin and Li Wei’s information was not passed up the fleet command system, but the system’s analysis of the battle was headed in the right direction. Realizing that the invisible enemy force posited by the computer decision-making system didn’t exist, attention was now focused on analyzing the aggregated battle information. After a search and match on massive amounts of data, the system finally discovered the continued existence of the droplet. The image of the droplet extracted from battle recordings was unchanged apart from the addition of a propulsion halo at the tail. It was still a perfect droplet shape, only this time what was reflected as it sped onward was the glow of nuclear fireballs and metal magma, glaring brightness alternating with dark red. It looked like a drop of burning blood. Further analysis arrived at a model of the droplet’s attack path.

Various scenarios for the Doomsday Battle had been concocted during two centuries of the study of space strategy, but in the minds of strategists, the enemy had always been big. Humanity would meet the main part of the mighty Trisolaran force on a space battlefield, with every warship a fortress of death the size of a small city. They had imagined every extreme form of weapons and tactics the enemy could possibly possess, the most terrifying of which involved the Trisolaran Fleet launching an attack using antimatter weapons, and obliterating a stellar-class battleship with antimatter the size of a rifle bullet.

But now the combined fleet had to face facts: Their only enemy was a tiny probe, one drop of water out of the enormous ocean of Trisolaran strength, and this probe attacked using one of the oldest and most primitive tactics known to human navies: ramming.

Roughly thirteen minutes passed from the moment the probe started its attack until the fleet command system arrived at the correct assessment. Given the complex and grim battlefield conditions, this was fairly quick, but the droplet was quicker. In twentieth-century naval battles, there might have been time for commanders to be summoned to the flagship for a conference once the enemy fleet appeared on the horizon. But space battles were measured in seconds, and in that thirteen-minute span, more than six hundred warships were destroyed by the probe. Only then did humanity realize that command of a space battle was beyond their reach. And due to the sophon block, it was beyond the reach of their artificial intelligence as well. Purely in terms of command, humanity might never have the capacity to engage in a space battle with Trisolaris.

The speed of the droplet’s strikes and its invisibility to radar meant that defensive systems on the first ships hit never responded. But as the distance between the warships grew and the droplet’s striking distance increased, defensive systems on all warships were recalibrated based on the droplet’s target characteristics. This meant that Nelson was the first ship to attempt to intercept, using laser weapons to increase the accuracy of firing on the small, high-speed target. When struck by the multiple beams, the droplet emitted a powerful visible light, even though the Nelson had fired gamma-ray lasers that were invisible to the naked eye. The droplet’s imperceptibility to radar had never been understood, since it had a completely reflective surface and a shape that was perfectly diffuse, but perhaps the ability to alter the frequency of reflected electromagnetic waves was the secret to this invisibility. The light emitted from the droplet when it was struck was so bright it drowned out the nuclear fireballs going off all around it, forced the monitoring systems to dim their images to avoid damage to their optical components, and caused sustained blindness to anyone who looked directly at it. In other words, this superpowerful light was indistinguishable from darkness in its effect. The droplet, wrapped in this all-engulfing light, entered Nelson and was extinguished, plunging the battlefield into pitch darkness. Moments later, the nuclear fireballs reestablished their dominance and the droplet emerged from Nelson unscathed and sped straight for Green, eighty-odd kilometers away.

Green ’s defense system switched over to EM-based kinetic weapons to intercept the attacking droplet. The metal shells fired by the railgun possessed enormous destructive power, and the kinetic energy inherent in their high speed meant that every shell that struck the target hit with the force of a bomb. Against ground targets, they would flatten a mountain in no time at all. The droplet’s relative velocity only added to the shells’ energy, but when they struck, the droplet slowed only slightly before it adjusted its propulsion and recovered its speed. Under a dense hail of shells, it flew straight at Green and penetrated it. Under the ultrahigh magnification microscope, the droplet’s surface would still be mirror-smooth and totally scratch-free.

Strong-interaction material differs from ordinary matter like solid differs from liquid. The attacks on the droplet by human weapons were like waves striking a reef. Damaging it was impossible, which meant that nothing in the Solar System could destroy it. It was untouchable.