Spencer’s current favorite product was magnesium, which was plentiful; they were getting twenty-five kilos of it from every cubic meter of regolith, he said, and it was so light in Martian g that a big bar of it felt like a piece of plastic. “It’s too brittle when pure,” Spencer said, “but if we alloy it just a bit we’ll have an extremely light and strong metal.”
“Martian steel,” Nadia said.
“Better than that.”
So, alchemy; but with finicky machines. Nadia found the Sabatier’s problem, and went to work fixing a broken vacuum pump. It was amazing how much of the factory complex came down to pumps, sometimes it seemed nothing but a mad assemblage of them, and by their nature they kept clogging with fines and breaking down.
Two hours later the Sabatier was fixed. On the way back to the trailer park, Nadia glanced into the first greenhouse. Plants were already blooming, the new crops breaking out of their beds of new black soil. Green glowed intensely in the reds of this world, it was a pleasure to see it. The bamboo was growing several centimeters a day, she had been told, and the crop was already nearly five meters tall. It was easy to see they were going to need more soil. Back at the alchemists’ they were using nitrogen from the Boeings to synthesize ammonia fertilizers; Hiroko craved these because the regolith was an agricultural nightmare, intensely salty, explosive with peroxides, extremely arid, and completely without biomass. They were going to have to construct soil just like they had the magnesium bars.
Nadia went into her habitat in the trailer park for a standing lunch. Then she was out again, to the site of the permanent habitat. The floor of the trench had been almost leveled in her absence. She stood on the edge of the hole, looking down in it. They were going to build to a design that she liked tremendously, one she had worked on herself in Antarctica and on the Ares: a simple line of barrel-vaulted chambers, sharing adjacent walls. By setting them in the trench the chambers would be half-buried to begin with; then when completed they would be covered by ten meters of sandbagged regolith, to stop radiation and also, because they planned to pressurize to 450 millibars, to keep the buildings from exploding. Local materials were all they needed for the exteriors of these buildings: Portland cement and bricks were it, basically, with plastic liner in some places to insure the seal.
Unfortunately the brickmakers were having some trouble, and they gave Nadia a call. Nadia’s patience was running short, and she groaned. “We travel all the way to Mars and you can’t make bricks?”
“It’s not that we can’t make bricks,” said Gene. “It’s just that I don’t like them.” The brickmaking factory mixed clays and sulphur extracted from the regolith, and this preparation was poured into brick molds, and baked until the sulphur began to polymerize, and then as the bricks cooled they were compressed a bit in another part of the machine. The resulting blackish-red bricks had a tensile strength that was technically adequate for use in the barrel vaults, but Gene wasn’t happy. “We don’t want to be at minimum values for heavy roofs over our heads,” he said. “What if we pile one too many sandbag on top of it, or if we get a little marsquake? I don’t like it.”
After some thought Nadia said, “Add nylon.”
“What?”
“Go out and find the parachutes from the freight drops, and shred them real fine, and add them to the clay. That’ll help their tensile strength.”
“Very true,” Gene said, after a pause. “Good idea! Think we can find the parachutes?”
“They must be east of here somewhere.”
So they had finally found a job for the geologists that actually helped the construction effort. Ann and Simon and Phyllis and Sasha and Igor drove long-distance rovers over the horizon to east of the base, searching and surveying far past Chernobyl, and in the next week they found almost forty parachutes, each one representing a few hundred kilos of useful nylon.
One day they came back excited, having reached Ganges Catena, a series of sinkholes in the plain a hundred kilometers to the southeast. “It was strange,” Igor said, “because you can’t see them until the last minute, and then they’re like huge funnels, about ten kilometers across and a couple deep, eight or nine in a row, each smaller and shallower. Fantastic. They’re probably thermokarsts, but they’re so big it’s hard to believe it.”
Sasha said, “It’s nice to see such a distance, after all this near horizon stuff.”
“They’re thermokarsts,” Ann said. But they had drilled and found no water. This was getting to be a concern; they hadn’t found any water to speak of in the ground, no matter how far down they drilled. It forced them to rely on the supplies from the air miners.
Nadia shrugged. The air miners were pretty tough. She wanted to think about her vaults. The new improved bricks were appearing, and she had started the robots building the walls and roofs. The brick factory filled little robot cars, which rolled like toy rovers across the plain to cranes at the site; the cranes pulled out bricks one by one, and placed them on cold mortar spread by another set of robots. The system worked so well that soon the bottleneck became brick production itself. Nadia would have been pleased, if she had had more faith in the robots. These seemed okay, but her experiences with robots in the years on Novy Mir had made her wary. They were great if everything went perfectly, but nothing ever went perfectly, and it was hard to program them with decision algorithms that didn’t either make them so cautious that they froze every minute, or so uncontrolled that they could commit unbelievable acts of stupidity, repeating an error a thousand times and magnifying a small glitch into a giant blunder, as in Maya’s emotional life. You got what you put into robots, but even the best were mindless idiots.
• • •
One evening Maya snagged her out in her tool room and asked her to switch to a private band. “Michel is useless,” she complained. “I’m really having a hard time, and he only looks at me like he wants to lick my skin. You’re the only one I trust, Nadia. Yesterday I told Frank that I thought John was trying to undercut his authority in Houston, but that he shouldn’t tell anyone I thought so, and the very next day John was asking me why I thought he was bothering Frank. There’s no one who will just listen and stay quiet!”
Nadia nodded, rolling her eyes. Finally she said, “Sorry, Maya, I have to go talk to Hiroko about a leak they can’t find.” She banged her faceplate lightly against Maya’s— symbol for a kiss on the cheek— and switched to the common band and took off. Enough was enough. It was infinitely more interesting to talk to Hiroko— real conversations, about real problems in the real world. Hiroko was asking Nadia for help almost every day, and Nadia liked that, because Hiroko was brilliant, and since landfall had obviously raised her estimate of Nadia’s abilities. Mutual professional respect, a great maker of friendships. And so nice to talk nothing but business. Hermetic seals, lock mechanisms, thermal engineering, glass polarization, farm/human interfaces (Hiroko’s talk was always a few steps ahead of the game). These topics were a great relief after all the emotional whispered conferences with Maya, endless sessions about who liked Maya and who didn’t like Maya, about how Maya felt about this and that, and who had hurt her feelings that day . . . bah. Hiroko was never strange, except when she would say something Nadia didn’t know how to deal with, like, “Mars will tell us what it wants and then we’ll have to do it.” What could you say to something like that? But Hiroko would just smile her big smile, and laugh at Nadia’s shrug.
At night the talk still went everywhere, vehement, absorbed, unself-conscious. Dmitri and Samantha were sure that they could soon introduce genetically engineered microorganisms into the regolith that would survive, but they would have to get permission first from the U.N. Nadia herself found the idea alarming; it made the chemical engineering in the factories look relatively straightforward, more like brickmaking than the dangerous acts of creation Samantha was proposing. Although the alchemists were performing some pretty creative things themselves. Almost every day they came back to the trailer park with samples of
new materials: sulphuric acid, sorel cements for the vault mortar, ammonium nitrate explosives, a calcium cyanamide rover fuel, polysulfide rubber, silicon-based hyperacids, emulsifying agents, a selection of test tubes holding trace elements extracted from the salts, and, most recently, clear glass. This last was a coup, as earlier attempts at glassmaking had produced only black glass. But stripping silicate feedstocks of their iron content had done the trick, and so one night they sat in the trailer passing around small wavy sheets of glass, the glass itself filled with bubbles and irregularities, like something out of the seventeenth century.
• • •
When they got the first chamber buried and pressurized, Nadia walked around inside it with her helmet off, sniffing the air. It was pressurized to 450 millibars, the same as the helmets and the trailer park, with an oxygen-nitrogen-argon mix, and warmed to about 15 degrees Centigrade. It felt great.
The chamber had been divided into two stories by a floor of bamboo trunks, set in a slot in the brick wall two-and-a-half meters overhead. The segmented cylinders made a sweet green ceiling, lit by neon tubes hung under them. Against one wall was a magnesium-and-bamboo staircase, leading through a hole to the upper story. She climbed up to have a look. Split bamboo over the trunks made a fairly flat green floor. The ceiling was brick, rounded and low. Up there they would locate the bedrooms and bathroom; the lower floor would be living room and kitchen. Maya and Simon had already put up wall hangings, made of nylon from the salvaged parachutes. There were no windows; lighting came only from the neon bulbs. Nadia disliked this fact, and in the larger habitat she was already planning, there would be windows in almost every room. But first things first. For the time being these windowless chambers were the best they could do. And a big improvement over the trailer park, after all.
As she went back down the stairs she ran her fingers over the bricks and mortar. They were rough, but warm to the touch, heated by elements placed behind them. There were heating elements under the floor as well. She took off her shoes and socks, luxuriating in the feel of the warm rough bricks underfoot. It was a wonderful room; and nice, too, to think that they had gone all the way to Mars, and there built homes out of brick and bamboo. She recalled vaulted ruins she had seen years ago on Crete, at a site called Aptera: underground Roman cisterns, barrel-vaulted and made of brick, buried in a hillside. They had been almost the same size as these chambers. Their exact purpose was unknown— storage for olive oil, some said, though it would have been an awful lot of oil. Those vaults were intact two thousand years after their construction, and in earthquake country. As Nadia put her boots back on she grinned to think of it. Two thousand years from now, their descendants might walk into this chamber, no doubt a museum by then, if it still existed— the first human dwelling built on Mars! And she had done it. Suddenly she felt the eyes of that future on her, and shivered. They were like Cro-Magnons in a cave, living a life that was certain to be pored over by the archaeologists of subsequent generations; people like her who would wonder, and wonder, and never quite understand.
• • •
More time passed, more work got done. It blurred for Nadia, she was always busy. The interior construction of the vaulted chambers was complicated, and the robots couldn’t help much with plumbing, heating, gas exchange, locks, and kitchens. Nadia’s team had all the fixtures and tools, and could work in pants and sweatshirts, but still it took an amazing amount of time. Work work work, day after day!
One evening, just before sunset, Nadia trudged across torn-up dirt to the trailer park, feeling hungry and beat and extremely relaxed, totally at ease, not that you didn’t have to be careful at the end of a day, she had torn a centimeter hole in the back of a glove the other evening being careless, and the cold hadn’t been so bad, about minus 50 degrees Centigrade, nothing compared to some Siberian winter days— but the low air pressure had sucked out a blood bruise instantly, and then that had started to freeze up, which made the bruise smaller no doubt, but slower to heal as well. Anyway, you had to be careful, but there was something so fluid about tired muscles at the end of a day’s construction work, the low rust sunlight slanting across the rocky plain, and all of a sudden she could feel that she was happy. Arkady called in from Phobos at just that moment, and she greeted him cheerily. “I feel just like a Louis Armstrong solo from 1947.”
“Why 1947?” he asked.
“Well, that was the year he sounded the most happy. Most of his life his tone has a sharp edge to it, really beautiful, but in 1947 it was even more beautiful because it has this relaxed fluid joy, you never hear it in him before or after.”
“A good year for him, I take it?”
“Oh yes! An amazing year! After twenty years of horrible big bands, you see, he got back to a little group like the Hot Five, that was the group he headed when he was young, and there it was, the old songs, even some of the old faces— and all of it better than the first time, you know, the recording technology, the money, the audiences, the band, his own power. . . . It must have felt like the fountain of youth, I tell you.”
“You’ll have to send up some recordings,” Arkady said. He tried to sing: “I can’t give you anything but love, baby!” Phobos was about over the horizon, he had just been calling to say hi. “So this is your 1947,” he said before he went.
Nadia put her tools away, singing the song correctly. And she understood that what Arkady had said was true; something had happened to her similar to what had happened to Armstrong in 1947— because despite the miserable conditions, her youthful years in Siberia had been the happiest of her life, they really had. And then she had endured twenty years of big-band cosmonautics, bureaucracy, simulations, an indoor life— all to get here. And now suddenly she was out in the open again, building things with her hands, operating heavy machinery, solving problems a hundred times a day, just like Siberia only better. It was just like Satchmo’s return!
Thus when Hiroko came up and said, “Nadia, this crescent wrench is absolutely frozen in this position,” Nadia sang to her, “That’s the only thing I’m thinking of— baby!” and took the crescent wrench and slammed it against a table like a hammer, and twiddled the dial to show Hiroko it was unstuck, and laughed at her expression. “The engineer’s solution,” she explained, and went humming into the lock, thinking how funny Hiroko was, a woman who held their whole ecosystem in her head, but couldn’t hammer a nail straight.
And that night she talked over the day’s work with Sax, and spoke to Spencer about glass, and in the middle of that conversation crashed on her bunk and snuggled her head into her pillow, feeling totally luxurious, the glorious final chorus of “Ain’t Misbehavin’
” chasing her off to sleep.
But things change as time passes; nothing lasts, not even stone, not even happiness. “Do you realize it’s ell ess one-seventy already?” Phyllis said one night. “Didn’t we land at ell ess seven?”
So they had been on Mars for half a Martian year. Phyllis was using the calendar devised by planetary scientists; among the colonists it was becoming more common than the Terran system. Mars’s year was 668.6 local days long, and to tell where they were in this long year it took the Ls calendar. This system declared the line between the sun and Mars at its northern spring equinox to be O°, and then the year was divided into 360 degrees, so that Ls = 0° - 90° was the northern spring, 9° -180° the northern summer, 18° - 270° the fall, and 27° - 360° (or 0° again) the winter.
This simple situation was complicated by the eccentricity of the Martian orbit, which is extreme by Terran standards, for at perihelion Mars is about forty-three million kilometers closer to the sun than it is at aphelion, and thus receiving about 45 percent more sunlight. This fluctuation makes the southern and northern seasons quite unequal. Perihelion arrives every year at Ls = 250°, late in the southern spring; so southern springs and summers are much hotter than northern springs and summers, with peak temperatures as much as thirty degrees higher. Southern autumns and winters are co
lder, however, occurring as they do near aphelion— so much colder that the southern polar cap is mostly carbon dioxide, while the northern one is mostly water ice.
So the south was the hemisphere of extremes, the north that of moderation. And the orbital eccentricity caused one other feature of note; planets move faster the closer they are to the sun, so the seasons near perihelion are shorter than those near aphelion; Mars’s northern autumn is 143 days long, for instance, while northern spring is 194. Spring fifty-one days longer than autumn! Some claimed this alone made it worth settling in the north.
• • •
In any case in the north they were, and summer had passed. The days got shorter by a little bit every day, and the work went on. The area around the base got more cluttered, more crisscrossed with tracks. They had laid a cement road to Chernobyl, and the base itself was now so big that from the trailer park it extended over the horizon in all directions: the alchemists’ quarter and the Chernobyl road to the east, the permanent habitat to the north, the storage area and the farm to the west, and the biomed center to the south.
The Martian Calendar
Year 1 (2027 AD)
669 total Martain days in 1 Martain year
24 months =
21 months at 28 days
3 months (every eighth) at 27 days
Eventually everyone moved into the finished chambers of the permanent habitat. The nightly conferences there were shorter and more routinized than they had been in the trailer park, and days went by when Nadia got no calls for help. There were some people she saw only once in a while; the biomed crew in its labs, Phyllis’s prospecting unit, even Ann. One night Ann flopped on her bed next to Nadia’s, and invited her to go along on an exploration to Hebes Chasma, some 130 kilometers to the southwest. Obviously Ann wanted to show her something outside the base area, but Nadia declined. “I’ve got too much work to do, you know.” And seeing Ann’s disappointment: “Maybe next trip.”