Nirgal was good with cold. He knew intimately all its many stages, and he did not dislike the feel of it. People who disliked cold did not understand that one could adjust to it, that its bad effects could all be dealt with by a sufficient push from within. Nirgal was very familiar with heat as well. If you pushed heat out hard enough, then cold only became a sort of vivid shocking envelope in which you moved. And so cold’s ultimate effect was as a stimulant, making you want to run.

“Hey Nirgal, what’s the air temperature?”

“Two seventy-one.”

Coyote’s laugh was scary, an animal cackle that included all the noises anything could make. Different every time too. “Here, let’s stop the wave machine and see what the lake looks like flat.”

The water of the lake was always liquid, while the water ice coating the underside of the dome had to stay frozen. This explained most of their mesocosmic weather, as Sax put it, giving them their mists and sudden winds, their rain and fog and occasional snow. On this day the weather machine was almost silent, the big hemisphere of space under the dome nearly windless. With the wave machine turned off, the lake soon settled down to a round flat plate. The surface of the water became the same white color as the dome, but the lake bottom, covered by green algae, was still visible through the white sheen. So the lake was simultaneously pure white and dark green. On the far shore the dunes and scrub pines were reflected upside down in this two-toned water, as perfectly as in any mirror. Nirgal stared at the sight, entranced, everything falling away, nothing there but this pulsing green/white vision. He saw: there were two worlds, not one — two worlds in the same space, both visible, separate and different but collapsed together, so that they were visible as two only at certain angles. Push at vision’s envelope, push like one pushed against the envelope of cold: push.’ Such colors!..

“Mars to Nirgal, Mars to Nirgal!”

They laughed at him. He was always doing that, they told him. Going off. His friends were fond of him, he saw that in their faces.

Coyote broke chips of flat ice from the strand, then skipped them across the lake. All of them did the same, until the intersecting white-green ripples made the upside-down world shiver and dance. “Look at that!” Coyote shouted. Between throws he chanted, in his bouncing English that was like a perpetual song: “You kids are living the best lives in history, most people just fluid in the great world machine, and here you’re in on the birth of a world! Unbelievable! But it’s pure luck you know, no credit to you, not until you do something with it, you could have been bom in a mansion, a jail, a shantytown in Port of Spain, but here you are in Zygote, the secret heart of Mars! ‘Course just now you’re down here like moles in a hole, with vultures above all ready to eat you, but the day is coming when you walk this planet free of every bond. You remember what I’m telling you, it’s prophecy my children! And meanwhile look how fine it is, this little ice paradise.”

He threw a chip straight ‘at the dome, and they all chanted Ice Paradise! Ice Paradise! Ice Paradise! until diey were helpless with laughter.

But that night Coyote spoke to Hiroko, when he thought no one was listening. “Roko you got to take those kids outside and show them the world. Even if it’s only under the fog hood. They’re like moles in a hole down here, for Christ’s sake.” Then he was gone again, who knew where, off on one of his mysterious journeys into that other world folded over them.

Some days Hiroko came into the village to teach them. These to Nirgal were the best days of all. She always took them down to the beach; and going to the beach with Hiroko was like being touched by a god. It was her world — the green world inside the white — and she knew everything about it, and when she was there the subtle pearly colors of sand and dome pulsed with both worlds’ colors at once, pulsed as if trying to break free of what held them. They sat on the dunes, watching the shore birds skitter and peep as they charged together up and down the strand. Gulls wheeled overhead and Hiroko asked them questions, her black eyes twinkling merrily. She lived by the lake with a small group of her intimates, Iwao, Rya, Gene, Evgenia, all in a little bamboo stand in the dunes. And she spent a lot of time visiting other hidden sanctuaries around the South Pole. So she always needed catching up on the village news. She was a slender woman, tall for one of the issei, as neat as the shore birds in her dress and her movement. She was old, of course, impossibly ancient like all the issei, but with something in her manner which made her seem younger than even Peter or Kasei — just a little bit older than the kids, in fact, with everything in the world new before her, pushing to break into all its colors.

“Look at the pattern this seashell makes. The dappled whorl, curving inward to infinity. That’s the shape of the universe itself. There’s a constant pressure, pushing toward pattern. A tendency in matter to evolve into ever more complex forms. It’s a kind of pattern gravity, a holy greening power we call viriditas, and it is the driving force in the cosmos. Life, you see. Like these sand fleas and limpets and krill — although these krill in particular are dead, and helping the fleas. Like all of us,” waving a hand like a dancer. “And because we are alive, the universe must be said to be alive. We are its consciousness as well as our own. We rise out of the cosmos and we see its mesh of patterns, and it strikes us as beautiful. And that feeling is the most important thing in all the universe — its culmination, like the color of the flower at first bloom on a wet morning. It’s a holy feeling, and our task in this world is to do everything we can to foster it. And one way to do that is to spread life everywhere. To aid it into existence where it was not before, as here on Mars.”

This to her was the supreme act of love, and when she talked about it, even if they didn’t fully understand, they felt the love. Another push, another kind of warmth in the envelope of cold. She touched them as she talked, and they dug for shells as they listened. “Mud clam! Antarctic limpet. Glass sponge, watch out, it can cut you.” It made Nirgal happy just to look at her.

And one morning, as they stood from their dig to do more beachcombing, she returned his gaze, and he recognized her expression — it was precisely the expression on his face when he looked at her, he could feel it in his muscles. So he made her happy too! Which was intoxicating.

He held her hand as they walked the beach. “It’s a simple ecology in some ways,” she said as they knelt to inspect another clam shell. “Not many species, and the food chains are short. But so rich. So beautiful.” She tested the temperature of the lake with her hand. “See the mist? The water must be warm today.”

By this time she and Nirgal were alone, the other kids running around the dunes or up and down the strand. Nirgal bent down to touch a wave as it stalled out next to their feet, leaving behind a white lace of foam. “It’s two seventy-five and a little over.”

“You’re so sure.”

“I can always tell.”

“Here,” she said, “do I have a fever?”

He reached up and held her neck. “No, you’re cool.”

“That’s right. I’m always about half a degree low. Vlad and Ursula can’t figure out why.”

“It’s because you’re happy.”

Hiroko laughed, looking just like Jackie, suffused with joy. “I love you, Nirgal.”

Inside he warmed as if a heating grate were in there. Half a degree at least. “And I love you.”

And they walked down the beach hand in hand, silently following the sandpipers.

Coyote returned, and Hiroko said to him, “Okay. Let’s take them outside.” .

And so the next morning when they met for school, Hiroko and Coyote and Peter led them through the locks and down the long white tunnel that connected the dome to the outside world. At its far end were located the hangar and the cliff gallery above it. They had run the gallery with Peter in the past, looking out the little polarized windows at the icy sand and the pink sky, trying to see the great wall of dry ice that they stood in — the south polar cap, the bottom of the world, which they lived in to escape the notice of people who would put them in jail.