They laughed. Vlad said, “Or remember the time we gave out mock awards in Underhill, and Simon got one for best video, and he went up to accept the award and said, Thank you,’ and started to return to his seat, and then he stopped and went back up to the podium, as if something had occurred to him to say, you know, which got our attention naturally, and he cleared his throat and said, Thank you very much.’ “

Ann almost laughed at that, and stood, and led them out into the frigid air. The old ones carried the box down to the beach, and everyone else followed. It was snowing through mist when they took his body out and buried it deep in the sand, just above the wave’s high-water mark. They slid the board out of the top of the long box and burned Simon’s name onto it with Nadia’s soldering iron, and stuck the board in the first dune. Now Simon would be part of the carbon cycle, food for bacteria and crabs and then sandpipers and gulls, thus slowly melting into the biomass under the dome. This was how one was buried. And sure, part of it was comforting; to spread out into one’s world, to disperse into it. But to end as a self, to go away…

They all were walking under the dim dome, having buried Simon in sand, trying to behave as if reality had not suddenly ripped apart and snatched one of them away. Nirgal couldn’t believe it. They straggled back into the village blowing on their hands, talking in subdued voices. Nirgal drew near Vlad and Ursula, longing for reassurance of some kind. Ursula was sad, and Vlad was trying to cheer her up. “He lived more than a hundred years, we can’t go around thinking his death was premature, or it makes a mockery of all those poor people who died at fifty, or twenty, or one.”

“But it was still premature,” Ursula said stubbornly. “With the treatments, who knows? He might have lived a thousand years.”

“I’m not so sure. It looks to me like the treatments are not in fact penetrating to every part of our bodies, And with all the radiation we’ve taken on, we may have more troubles than we thought at first.”

“Maybe. But if we had been at Acheron, with the whole crew, and a bioreactor, and all our facilities, I bet we would have saved him. And then you can’t say how many more years he might have had. I call that premature.”

She went off to be by herself.

That night Nirgal could not sleep at all. He kept feeling the transfusions,, seeing every moment of them and imagining that there had been some kind of backwash in the system, so that he had been infected with the disease. Or contaminated by touch a’sne, why not? Or just by that last look in Simon’s eye! So that he had caught the disease they could not stop, and would die. Stiffen up, go mute, stop and go away. That was death. His heart pounJed and a sweat broke through his skin, and he cried with the fear of it. There was no avoiding it; and it was horrible. Horrible no matter when it happened. Horrible that the cycle itself should work the way it did — that it should go around and around and around, while they lived only once and then died forever. Why live at all? It was too strange, too horrible. And so he shivered through the long night, his mind gone cyclonic with the fear of death.

After thathe found it extremely hard to concentrate. He felt as if he was always at a remove from things, as if he had slipped into the white world and could not quite touch the green one.

Hiroko noticed this problem, and suggested he go with Coyote on one of his trips out. Nirgal was shocked by the idea, having never been more than a walk away from Zygote. But Hiroko insisted. He was seven years old, she said, and about to become a man. Time he saw a bit of the surface world.

A few weeks later Coyote dropped by, and when he left again Nirgal was with him, seated in the copilot’s seat of his boulder car, and goggling out the low windshield at the purple arch of evening sky. Coyote turned the car around to give him a view of the great glowing pink wall of the polar cap, which arced across the horizon like an enormous rising moon.

“It’s hard to believe something that big could ever melt,” Nirgal said.

“It will take a while.”

They drove north at a sedate pace. The boulder car was stealthed, covered by a hollowed-out rock shell that was thermally regulated to stay the same temperature as its surroundings, and it had a no-track device on the front axle to read the terrain and pass the information to the back axle, where scraper-shapers plowed their wheel tracks, returning the sand and rock to whatever shape they had had before their passing. So they could not race along.

For a long time they traveled in silence, though Coyote’s silence was not the same as Simon’s had been. He hummed, he muttered, he talked in a low singsong voice to his AI, in a language that sounded like English but was not comprehensible. Nirgal tried to concentrate on the limited view out the window, feeling awkward and shy. The region around the south polar cap was a series of broad flat terraces, and they descended from one to the next by routes that seemed programmed into the car, down terrace after terrace until it seemed the polar cap must be sitting on a kind of huge pedestal. Nirgal stared into the dark, impressed by the size of things, but happy too that it was not absolutely overwhelming, as his first walk out had been. That had happened a long time ago, but he could still remember the staggering astonishment of it perfectly.

This was not like that. “It doesn’t seem as big as I thought it would,” he said. “I guess it’s the curvature of the land, it being such a small planet and all.” As the lectern said. “The horizon isn’t any farther away than one side of Zygote to the other!”

“Uh huh,” Coyote said, giving him a look. “You better not let Big Man hear you say such a thing, he kick your ass for that.” Then ”Who’s your father, boy?”

“I don’t know. Hiroko is my mother.”

Coyote snorted. “Hiroko takes the matriarchy too far, if you ask me.”

“Have you told her that?”

“You bet I have, but Hiroko only listens to me when I say things she wants to hear.” He cackled. “Same as with everyone, right?”

Nirgal nodded, a grin splitting his attempt to be impassive.

“You want to find out who your father is?”

“Sure.” Actually he was not sure. The concept of father meant little to him; and he was afraid it would turn out to be Simon. Peter was like an older brother to him, after all.

“They’ve got the equipment in Vishniac. We can try there if you want.” Coyote shook his head. “Hiroko is so strange. When I met her you would never have guessed it would come to this. Of course we were young then — almost as young as you are, though you will find that hard to credit.”

Which was true.

“When I met her she was just a young eco-engineering student, smart as a whip and sexy as a cat. None of this mother goddess of the world stuff. But by and by she started to read books that were not her technical manuals, and it went on and on and by the time she got to Mars she was crazy. Before, actually. Which is lucky for me as that is why I’m here. But Hiroko, oh my. She was convinced that all human history had gone wrong at the start. At the dawn of civilization, she would say to me very seriously, there was Crete and Sumeria, and Crete had a peaceful trading culture, run by women and filled with art and beauty — a Utopia in fact, where the men were acrobats who jumped bulls all day, and women all night, and got the women pregnant and worshipped them, and everyone was happy. It sounds good except for the bulls. While Sumeria on the other hand was ruled by men, who invented war and conquered everything in sight and started all the slave empires that have come since. And no one knew, Hiroko said, what might have happened if these two civilizations had had a chance to contest the rule of the world, because a volcano blew Crete to kingdom come, . and the world passed into Sumeria’s hands and has never left it to this day. If only that volcano had been in Sumeria, she used to tell me, everything would be different. And maybe it’s true. Because history could hardly get any blacker than it has been.”