Heavy Water and Other Stories

“Dead ones. But I digress. You go posthistorical and the question is: now what? As I say, three billion three million nine hundred and ninety-nine thousand years ago, Martians were lords of all they surveyed. They were ready. Ready for what? Ready for war.”

The robot let this ripple out through the moist air, over the ranked metal seats.

“Yes, that’s right. Mars, the Planet of War. Congratulations. The only time you ever get anywhere is when you follow the artistic pulse. You even got the moons. I quote: ‘Two lesser stars, or satellites, revolve about Mars; whereof the innermost is distant from the center of the primary planet exactly three of its diameters, and the outermost five.’ That’s not one of your early Mars watchers, some chump like Schiapperelli or Percival Lowell. That’s Gulliver’s Travels. Phobos and Deimos. Just so. Fear and Panic. Hitherto, there had never been any disharmony on Mars. Firm but wise world government was proceeding without friction. There was never any of that brawling and scragging that you went in for. Mars had tried peace, but now the time felt right. What else was there to do? We divided, almost arbitrarily, into two sides. We were ready. One called the other People of Fear. The other called the one People of Panic. There wasn’t a dissenting voice on the whole planet. Everyone was absolutely all for it. Imagine two superfuturistic Japanese warrior cults, with architecture by Albert Speer. I guess that’ll give you some idea.

“We fell into a rhythm. Arms races followed by massive conflicts. We’d pepper each other with all kinds of superexotic weaponry in delightfully elaborate successions of thrusts and feints and counters. But in the end nothing could match the hit of central thermonuclear exchange. We always ended up throwing everything we had at each other, in arsenal-clearing deployments. After the devastation, we rebuilt toward another devastation. No complaints. Shelter culture had come on a long way. Casualties could be patched up good as new. And fatalities were simply resurrected—except, of course, in cases of outright vaporization. They took their nuclear winters like Martians. The lulls lasted centuries. The battles were over in an afternoon.

“It doesn’t make a lot of obvious sense, does it? Later on they tended to argue that it was a necessary stage in their military development. They felt that they were… rich in time. They didn’t know—as I do—that this happens to all type-v worlds in the posthistorical phase. Without exception. They go insane.

“The Hydrogen War of the Two Nations lasted for 112 million years, and was followed, six months later, by the Seventy Million Years War, in which the use of quantum-gravity weapons exponentially increased the firepower of both sides. By this time another factor was preying on Martian mental health. Immortality. That’s actually not a very useful word. Put it this way. Everyone on Mars was looking at a future-endless worldline. And in a type-v context that always messes with your head. There was one more great war, the War of the Strong Nuclear Force, which dragged on for 284 million years. When they came out of that, there was a general feeling that Mars was in something of a rut. So they decided to stop fucking around. You, at this stage, by the way, were still doing your imitation of a septic tank. Well, and why not? It was a very good imitation of a septic tank.

“First there were matters to attend to in our own backyard. People of Fear and People of Panic united to face a common enemy. One found near by.”

The janitor on Mars fell silent; his head, with its steel arc, was interrogatively poised. Vladimir Voronezh, one of the Russian Laureates (his field was galaxy formation), spoke up, saying,

“My dear sir, I feel you are now going to tell us that life thrived elsewhere in the solar system, once upon a time.”

“Certainly. You’ve got to lose this habit of thinking about the ‘miracle’ of life, the stupendous ‘accident’ of intelligence, and so on. I can assure you that in this universe cognition is as cheap as spit. Being a type-v world, Mars was extremely insular in its Total Wealth phase. There was no interest in space exploration, despite adequate technology. But we were perfectly well aware of the coexistence of two type-w worlds: Jupiter and—”

“Jupiter?” This was Lord Kenrick Douglas (quasars): tall, bearded, famous. “Sir, we do know something about the solar system. Jupiter is a gas giant. It is wreathed in freezing clouds six hundred miles deep on a shell of liquid hydrogen. Our suicide probes tell us that there are no solid surfaces on this planet. Would you tell us what the Jovians looked like? Jellyfish with powerpacks? Wearing scuba suits, no doubt?”

This last drollery aroused some anxious laughter. The janitor tensed himself to the sound, not with umbrage but with concentration, with efficient curiosity. He said,

“Can I ask you a question?” He seemed to be addressing Miss World. “Did they laugh just now because they thought he was funny or because they thought he was full of shit? No. Never mind. Let me tell you, Lord Nobel Laureate, that Jupiter wasn’t always a gas giant. Originally it was much smaller and denser. Rock mantle on an iron silicate core. But that was before they fucked with Mars.

“The storm system that you call the Great Spot? The Earth-sized zit in its southern tropic? That was ground zero for an NH4 device we sent their way.”

“Ammonia?” asked Voronezh, with a glint in his eye.

“Right. It’s something we were very proud of, for a while. We turned their place into a colossal stink bomb without altering its mass. To avoid perturbation problems further down the line. Some said at the time that the War with Jupiter might have been bypassed quite easily. Mars overreacted, some said. I mean, a type-w planet, hundreds of millions of years away from posing any plausible threat. Whatever, the War with Jupiter was wrapped up in six months. But then we faced perceived disrespect from another quarter, and turned our attention to—”

“Don’t tell me,” said Lord Kenrick. “Venus.”

“Wrong direction. No, not Venus. Ceres.”

The janitor on Mars waited. Fukiyama (superstrings) said dutifully, “Ceres isn’t a planet. It’s the biggest rock in the asteroid belt.”

Calmly inspecting the tips of his talons the janitor on Mars said, “Yeah, right. They wanted to play rough and so…” He shrugged and added, “It was as our expeditionary force was returning from Jupiter that it picked up the ambiguous transmission from Ceres, another type-w world, though well behind Jupiter. It’s possible that in the heat of the moment the Martian commander mistakenly inferred an undertone of sarcasm in the Cerean message of tribute. The War with Ceres, in any case, ended that same afternoon. Then for several weeks, on the home planet, there reigned an uneasy peace. Plans were drawn up for a preemptive strike against Earth. Some Martians sensed aggressive potential there. Because—hey. Action on the blue planet. Photosynthesis. Photochemical dissociation of hydrogen sulphide, no less. Light energy used to break the bonds cleaving oxygen to hydrogen and carbon. Bacteria becomes cyanobacteria. Gangway. Where’s the fire? But then something happened that changed all our perspectives. Suddenly we knew that all this was bullshit and the real action lay elsewhere.

“In the year 2,912,456,327 B.C., by your calendar, the Scythers of the Orion Spur sent a warning shot across our bows. They compacted Pluto. Pluto was originally a gas giant the size of Uranus. And the Scythers scrunched it. Without a care for mass-conservation—hence the perturbations you’ve noticed in Neptune. You thought Pluto was a planet? You thought Pluto was supposed to look like that? In the Scythers of the Orion Spur I suppose you could say that Mars had found an appropriate adversary. A type-v world. Same weaponry. Same mental-health problems. Rather superior cosmonautics. The War with the Scythers of the Orion Spur—the combatants being separated by twenty kiloparsecs—was, as you can imagine, a somewhat protracted affair. Door to door, the round trip took 150,000 years: at even half-lightspeed, achievable with our scoop drives, relativistic effects were found to be severe. Still, the great ships went out. Wave after wave. The War with the Scythers of the Orion Spur was hotly prosecuted for just over a billion years. Who won? We did. They’re still there, the Scythers. Their planet is still there. The nature of war changed, during that trillennium. It was no longer nuclear or quantum- gravitational. It was neurological. Informational. Life goes on for the Scythers, but its quality has been subtly reduced. We fixed it so that they think they’re simulations in a deterministic computer universe. It is believed that this is the maximum suffering you can visit on a type-v world. The taste of victory was sweet. But by then we knew that interplanetary war, even at these distances, was essentially bullshit too. Oh and meanwhile, in that billion-year interlude, all hell has been breaking out on Earth. Oxygen established as an atmospheric gas. Cells with nuclei. All hell is breaking out.

“The Scyther War broadened our horizons. Martian astronomers had become intensely interested in a question that you yourselves are still wrestling with. I mean dark matter. The speed with which galaxies rotate suggests that 98.333 percent of any given galactic mass is invisible and unaccounted for. We went through all the hoops you’re going through, and more. What was the dark matter? Massive neutrinos? Failed stars? Slain planets? Black holes? Resonance residue? Plasma fluctuation? Then we kind of flashed it. The answer had been staring us in