“But it’s not a game we’re playing here,” Sax said. It was extremely hard to keep Stephen’s sense of humor about it; for some reason it was really irritating to him, really distressing. Here they had started so well, sixty years of solid achievement— and now different people were hacking about with different ideas and different toys, arguing and working against each other, bringing ever more powerful and expensive methods to bear, but with ever less coordination. They were going to ruin his plan!

• • •

The afternoon’s closing sessions were perfunctory, and did nothing to restore his faith in the conference as disinterested science. That evening, back in his room, he watched the environmental news on vid more closely than ever, searching for answers to questions he hadn’t quite formulated. Cliffs were falling. Rocks of all sizes were being shoved out of the permafrost by the thaw-freeze cycle, the rocks arranging themselves into characteristic polygonal patterns. Rock glaciers were forming in ravines and chutes, the rocks pried free by ice and then sliding down gorges in masses that behaved much like ice glaciers. Pingos were blistering the northern lowlands, except of course where the frozen seas were pouring out of the drilling platforms, inundating the land.

It was change on a massive scale, becoming apparent everywhere now, and accelerating every year as the summers got warmer, and the submartian biota grew deeper— while everything still froze solid every winter, and froze a little bit almost every summer night. Such an intense freeze-thaw cycle would tear any landscape apart, and the Martian landscape was particularly susceptible to it, having been stalled in a cold arid stasis for millions of years. Mass wasting was causing many landslides a day, and fatalities and unexplained disappearances were not at all uncommon. Cross-country travel was dangerous. Canyons and fresh craters were no longer safe places to locate a town, or even to spend a night.

Sax stood and walked to the window of his room, looked down at the lights of the city. All of this was as Ann had predicted to him, long ago. No doubt she was noting reports of all the changes with disgust, she and all the rest of the Reds. For them every collapse was a sign that things were going wrong rather than right. In the past Sax would have shrugged them off; mass wasting exposed frozen soil to the sun, warming it and revealing potential nitrate sources and the like. Now, with the conference fresh in his mind, he was not so sure.