But it didn’t. A hundred meters farther on, the ice on the left closed in and met the ice over the rockface to the right, and that was it: dead end.
On the way back he walked more slowly, stopping to inspect cracks in the ice, and bits of rock underfoot that had perhaps been plucked from the escarpment. In one fissure the cobalt of the ice turned blue-green, and reaching into it with a gloved finger, he pulled out a long dark green mass, frozen on the surface but soft underneath. It was a long dentritic mass of blue-green algae.
“Wow,” he said, and plucked a few frozen strands away, then shoved the rest back into their home crack. He had read that algae were burrowing down into the rock and ice of the planet, and bacteria were going even deeper; but actually to find some buried down here, so far from the sun, was enough to make one marvel. He turned off his headlamp again, and the luminous cobalt blue of the glacial light glowed around him, dim and rich. So dark, so cold, how did any living thing do it?
“Stephen?”
“I’m coming. Look,” he said to Phyllis when he returned to her side, “it’s blue-green algae, all the way down here.”
He held it out for her to look at, but she only gave it the briefest glance. He sat down and got out a sample bag from his thigh pocket, and put a small strand of algae inside, then stared at it through his 20x magnifying lenses. The lenses were not powerful enough to show him all he wanted to see, but they did reveal the long strands of dentritic green, looking slimy as they thawed out. His lectern had catalogs with photos at similar magnifications, but he couldn’t find the species that resembled this one in every detail. “It could be nondescript,” he said. “Wouldn’t that be something. It really makes you wonder if the mutation rate out here is higher than the standard rates. We should work up experiments to determine that.”
Phyllis did not reply.
Sax kept his thoughts to himself as he continued to search through the catalogs. He was still at it when they heard scratchy squeals and hisses over their radio, and Phyllis began calling out over the common band. Soon they could hear voices on the intercom, and not long after that, a round helmet filled the hole overhead. “We’re here!” Phyllis cried.
“Wait a second,” Berkina said, “we’ve got a rope ladder for you.”
And after an awkward swinging climb they were back on the surface of the glacier, blinking in the dusty fluctuating daylight, and crouching over to meet the gusts of wind, which were still powerful. Phyllis was laughing, explaining what had happened in her usual manner — “We were holding hands so we didn’t lose each other, and boom, down we went!” — and their rescuers were describing the brute force of the strongest gusts. All seemed back to normal; but when they got inside the station, and took off their helmets, Phyllis gave him a brief searching glance, a very curious look indeed, as if he had revealed something to her out there which had made her wary — as if he had somehow reminded her of something, down in that crevasse. As if he had behaved down there in a manner which gave him away, without hope of contradiction, as her old comrade Saxifrage Russell.
Through the Northern fall they worked around the glacier, and saw the days grow shorter, and the winds colder. Big intricate ice flowers grew on the glacier every night, and only melted at the edges briefly in the midafternoons, after which they hardened and served as the base for even more complex petals that appeared the next morning, the small sharp crystalline flakes bursting away in every direction from the larger fins and tines beneath. They could not help crushing entire fractal worlds with every step as they crunch-crunched over the ice, looking for the plants now covered in frost, to see how they were coping with the coming cold. Looking across the bumpy white waste, feeling the wind cut through one of the thicker insulated walkers, it seemed to Sax that a very severe winterkill was inevitable.
But looks were deceptive. Oh there would be winterkill, of course; but the plants were hardening, as the overwintering gardeners called it, acclimatizing to the onset of winter. It was a three-stage process, Sax learned, digging in the thin hard-packed snow to find the signs. First, phytochrome clocks in the leaves sensed the shorter days-and now they were getting shorter fast, with dark fronts coming through every week or so, dumping dirtywhite snow out of black low-bellied cumulonimbus clouds. In the second stage, growth ceased, carbohydrates translocated to the roots, and amounts of abscisic acid grew in some leaves until they fell off. Sax found lots of these leaves, yellowed or brown and still hanging from their stems, hugging the ground and providing the yet living plant with some more insulation. During this stage water was moving out of cells into intercellular ice crystals, and the cell membranes were toughening, while sugar molecules replaced water molecules in some proteins. Then in the third and coldest stage, a smooth ice formed around the cells without rupturing them, in a process called vitrification.
At this point the plants could tolerate temperatures down to 220°K, which had been approximately the average temperature of Mars before their arrival, but was now about as cold as it got. And the snow which fell in the ever more frequent storms actually served as insulation for the plants, keeping the ground that it covered warmer than the windy surface. As he dug around in the snow with numbed fingers, the subnivean environment looked to Sax to be a fascinating place, especially the adaptations to the spectrally selected blue light that was transmitted through as much as three meters of snow-^-another example of Rayleigh scattering. He would have liked to study this winter world in person for the entire six months of the season; he found he liked it out under the low dark waves of cloud, on the white surface of the snowy glacier, leaning into the wind and stomping through drifts. But Claire wanted him to return to Burroughs, to work with the labs there on a tundra tamarisk they were close to succeeding with in the Mars jars. And Phyllis and the rest of the crew from Armscor and the Transitional Authority were going back as well. So one day they left the station to a little crew of researcher-gardeners, and got in a caravan of cars, and drove back south together.
Sax had groaned when he heard that Phyllis and her group would be going back with them. He had hoped that mere physical separation would end the relationship with Phyllis, and get him away from that probing eye. But as they were going back together, it looked like some sort of action would have to be taken. He would have to break it off if he wanted it to end, which he did. The whole idea of getting involved with her had been a bad one to begin with; talk about the surge of the unexplainable! But the surge was over,
and he was left in the company of a person who was at best irritating, and at worst dangerous. And of course it was no comfort to think that he had been acting in bad faith the entire time. No step along the way had seemed more than a little thing; but altogether it came to something rather monstrous.
So their first night back in Burroughs, when his wrist beeped and Phyllis appeared to ask him out to dinner, he agreed and ended the call, and muttered to himself uneasily. It was going to be awkward.
They went out to a patio restaurant that Phyllis knew of on Ellis Butte, west of Hunt Mesa. Because of Phyllis they were seated at a corner table, with a view over the high district between Ellis and Table Mountain, where the woods of Princess Park were ringed by new mansions. Across the park Table Mountain was so glass-walled that it looked like a giant hotel, and the more distant mesas were not much less gaudy.
Waiters and waitresses brought by a carafe of wine, and then dinner, interrupting Phyllis’s chatter, which was mostly about the new construction on Tharsis. But she seemed very willing to talk with the waiters and waitresses, signing napkins for them, and asking where they were from, how long they had been on Mars, and so forth. Sax ate steadily and watched Phyllis, and Burroughs, waiting for the meal to come to an end. It seemed to go on for hours.
But finally they were done, and taking the elevator ride to the valley floor. The elevator brought back memories of their first night together, which made Sax acutely uncomfortable. Perhaps Phyllis felt the same way, for she moved to the other
side of the car, and the long descent passed in silence.
And then on the streetgrass of the boulevard she pecked him on the cheek with a swift hard hug, and said, “It’s been a lovely evening, Stephen, and a lovely time out at Arena as well, I’ll never forget our little adventure under the glacier. But now I have to get back up to Sheffield and deal with everything that’s been piling up, you know. I hope you’ll come visit me if you’re ever up there.”
Sax struggled to control his face, trying to figure out how Stephen would feel and what he would say. Phyllis was a vain woman, and it was possible she would forget the entire affair faster if she was avoiding thought about the hurt she had caused someone by dropping him, rather than brooding over why he had seemed so relieved. So he tried to locate the minority voice inside him that was offended to be treated in such a manner. He tightened the corners of his mouth, and looked down to the side. “Ah,” he said.
Phyllis laughed like a girl, and caught him up in an affectionate hug. “Come on,” she admonished him. “It’s been fun, hasn’t it? And we’ll see each other again when I visit Burroughs, or if you ever come up to Sheffield. Meanwhile, what else can we do? Don’t be sad.”
Sax shrugged. This made such sense that it was hard to imagine any but the most lovelorn suitor objecting, and he had never pretended to be that. They were both over a hundred, after all. “I know,” he said, and gave her a nervous, rueful smile. “I’m just sorry the time has come.”
“I know.” She kissed him again. “Me too. But we’ll meet again, and then we’ll see.”
He nodded, looking down again, feeling a new appreciation for the difficulties actors faced. What to do?
But with a brisk good-bye she was off. Sax said his own goodbye to a look over the shoulder, a quick wave.
He walked across Great Escarpment Boulevard, toward Hunt Mesa. So that was that. Easier than he had thought it would be, certainly. In fact, extremely convenient. But a part of him was still irritated. He looked at his reflection in the shop windows he passed on the lower floors of Hunt. A raffish old geezer; handsome? Well, whatever that meant. Handsome for some women, sometimes. Picked up by one and used as a bed partner for a few weeks, then tossed aside when it was time to move on. Presumably it had happened to many another through the years, more often to women than to men, no doubt, given the inequalities of culture and reproduction. But now, with reproduction out of the picture, and the culture in pieces… She really was rather awful. But then again he had no right to complain; he had agreed to it without conditions, and had lied to her from the very start, not only about who he was, but about how he felt toward her. And now he was free of it, and all that it implied. And all that it threatened.
Feeling a kind of nitrous oxide lift, he walked up Hunt’s huge atrium staircase to his floor, and down the hall to his little apartment.
* * *
Late that winter, for a couple of weeks in 2 February, the annual conference on the terraforming project took place in Burroughs. It was the tenth such conference, titled by the organizers “M-38: New Results and New Directions,” and it would be attended by scientists from all over Mars, nearly three thousand of them all told. The meetings were held in the big conference center in Table Mountain,, while the visiting scientists stayed in hotels all over the city.
Everyone at Biotique Burroughs went over to attend the meetings, hurrying back to Hunt Mesa if they had experiments running that they wanted to check in on. Sax was intensely interested in every aspect of the conference, naturally enough, and on its first morning he went down early to Canal Park and grabbed a coffee and pastry, and walked up to the conference center and was nearly the first in line at the check-in table. He took his packet of program information, pinned his name tag to his coat, and wandered through the halls outside the meeting rooms, sipping his coffee, reading the program for the morning, and glancing at the poster displays set in designated parts of the halls.
Here, and for the first time in more years than he could remember, Sax felt supremely in his element. Scientific conferences were all the same, at all times and in all places, even down to the way people dressed: the men in conservative, slightly shabby professorial jackets, all tans and browns and dark rust colors; the women, perhaps thirty percent of the total population, in unusually drab and severe business dress; many people still wearing spectacles, even though it was a rare vision problem that was not correctable by surgery; most of them carrying around their program packets; everyone with their name tag on their left lapel. Inside the darkened meeting rooms Sax passed talks that were beginning, and there too all was the same as ever: speakers standing before video screens that displayed their graphs and tables and molecular structures and so on, talking in stilted cadences timed to the rhythm of their images, using a pointer to indicate the parts of overcrowded diagrams that were relevant… The audiences, composed of the thirty or forty colleagues most interested in the work being described, sat in rows of chairs next to their friends, listening closely and readying questions that they would ask at the end of the presentation.
For those fond of this world, it was a very pleasant sight. Sax poked his head into several of the rooms, but none of the talks intrigued him enough to draw him in, and soon he found himself in a hall full of poster displays, so he kept on browsing.
“Solubilization of Polycyclic Aromatic Hydrocarbons in Mono-meric and Micellar Surfactant Solutions.” “Post-Pumping Subsidence in Southern Vastitas Borealis.” “Epithelial Resistance to Third-Stage Gerontological Treatment.” “Incidence of Radial Fracture Aquifers in Impact Basin Rims.” “Low-voltage Electroporation of Long Vector Plasmids.” “Katabatic Winds in Echus Chasma.” “Base Genome for a New Cactus Genera.” “Resurfacing of the Martian Highlands in the Amenthes and Tyrrhena Region.” “Deposition of the Nilosyrtis Sodium Nitrate Strata.” “A Method for Assessing Occupational Exposure to Chlorophenates Through Analysis of Contaminated Work Clothing.”
As always, the posters were a deliciously mixed bag. They were posters rather than talks for a variety of reasons-often the work of graduate students at the university in Sabishii, or concerned with topics peripheral to the conference-but anything might be there, and it was always very interesting to browse. And at this conference there had been no strong attempt to organize the posters into hallways by subject matter, so that “Distribution of Rhizocarpon geo-graphicum in the East Charitum Monies,” detailing the high-altitude fortunes of a crustose lichen that could live up to four thousand years, was facing “Origins of Graupel Snow in Saline Particulates Found in Cirrus, Altostratus and Altocumulus Clouds in Cyclonic Vortexes in North Tharsis,” a meteorological study of some importance.
Sax was interested in everything, but the posters that held him the longest were those that described aspects of the terraforming that he had initiated, or once had a hand in. One of these, “Estimate of the Cumulative Heat Released by the Underhill Windmills,” stopped him in his tracks. He read it through twice, feeling a slight dampening of spirits as he did.
The mean temperature of the Martian surface before their arrival had been around 220°K, and one of the universally agreed-upon goals of terraforming was to raise that mean temperature to something above the freezing point of water, which was 273°K. Raising the average surface temperature of an entire planet by more than 53°K was a very intimidating challenge, requiring, Sax had figured, the application over time of no less than 3.5 X 10” joules to every square centimeter of the Martian surface. Sax in his own modeling had always aimed to reach a mean of about 274°K, figuring that with this as the average, the planet would be warm enough for much of the year to create an active hydrosphere, and thus a biosphere. Many people advocated even more warming than that, but Sax did not see the need.
In any case, all methods for adding heat to the system were judged by how much they had raised the global mean temperature; and this poster examining the effect of Sax’s little windmill heaters estimated that over seven decades they had added no more than
0.05°K. And he could find nothing wrong with the various assumptions and calculations in the model outlined in the poster. Of course heating was not the only reason he had distributed the windmills; he had also wanted to provide warmth and shelter for an early engineered cryptoendolith he had wanted to test on the surface. But all those organisms had in fact died immediately upon exposure, or shortly thereafter. So on the whole the project could not be said to be one of his better efforts.
He moved on. “Application of Process-Level Chemical Data in Hydrochemical Modeling: Dao Vallis Watershed, Hellas.” “Increasing CO2 Tolerance in Bees.” “Epilimnetic Scavenging of Compton Fallout Radionuclides in the Marineris Glacial Lakes.” “Clearing Fines from Piste Reaction Rails.” “Global Warming As a Result of Released Halocarbons.”
This last one stopped him again. The poster was the work of the atmospheric chemist S. Simmon and some of his students, and reading it made Sax feel considerably better. When Sax had been made head of the terraforming project in 2042, he had immediately initiated the construction of factories to produce and release into the atmosphere a special greenhouse gas mix, composed mostly of carbon tetrafluoride, hexafluoroethane, and sulphur hexafluoride, along with some methane and nitrous oxide. The poster referred to this mix as the “Russell Cocktail,” which was what his Echus Overlook team had called it in the old days. The halocarbons in the cocktail were powerful greenhouse gases, and the best thing about them was that they absorbed outgoing planetary radiation at the 8-to 12-micron wavelength, the so-called “window” where neither water vapor nor CO2 had much absorptive ability. This window, when open, had allowed fantastic amounts of heat to escape back into space, and Sax had decided early on to attempt to close it, by releasing enough of the cocktail so that it would form ten or twenty parts per million of the atmosphere, following the classic early modeling on the subject by McKay et al. So from 2042 on, a major effort had been put into building automated factories, scattered all over the planet, to process the gases from local sources of carbon and sulphur and fluorite, and then release them into the atmosphere. Every year the amounts pumped out had increased, even after the twenty parts per million level had been reached, because they wanted to retain that proportion in an ever-thickening atmosphere, and also because they had to compensate for the continual high-altitude destruction of the halocarbons by UV radiation.
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