Blue Mars(188)
He blocked her view of the ground directly before them, so she had to look forward in the blaze-and-black, with sweat in her eyes. It was hard going, and twice more she fell; but while running she thumped along at a good speed back toward the city.
Then she felt sunlight on her back. It was like the pricking of needles, even through her insulated suit. Massive surge of adrenaline; blinded by the light; some kind of valley aligned to the dawn; then back into the patchy zone of light-shot shadows, a crazy chiaroscuro; then, slowly, back into the terminator proper, everything shadowed and dim except for the fiery city wall, blazing far above. She was gasping hard for air, sweating heavily, hot from exertion now rather than sunlight. And yet still the sight of the incandescent arc at the top of the city was enough to make one into a Mithraist.
Of course even when the city was directly over them, there was no immediate way of getting back up into it. She had to run past it, on to the next underground station. Complete focus on running, for minute after minute. Lactic-acid pain. And there it was, up ahead on the horizon, a door in a hill beside the tracks; pound and pound over the smoothed regolith. Violent hammering on the door got the two of them let into the lock and inside, where they were arrested; but Zo just laughed at the spasspolizei, and got her helmet off, and Miguel’s, and kissed the sobbing Miguel repeatedly for his clumsiness. In his pain he didn’t notice, he was latched onto her as a drowning man to a lifesaver. She only succeeded in disengaging herself from his grasp by banging him gently on his hurt knee. She laughed out loud at his howl, feeling a rush pour through her; such adrenaline, so beautiful, rarer by far than any sexual orgasm, thus more precious. So she kissed Miguel again and again, kisses that he did not notice, and then she barged through the spasspolizei, claiming diplomatic status and a need for haste. “Get him some drugs, you fools,” she said. “A shuttle for Mars is leaving tonight, I have to go.”
“Thank you, Zo!” Miguel cried. “Thank you! You saved my life!”
“I saved my trip home,” she said, and laughed at his expression. She returned to kiss him some more. “It’s me should be thanking you! Such an opportunity! Thank you, thank you.”
“No, thank you!”
“No, thank you!”
And even in his agony he laughed. “I love you, Zo.”
“And I love you.”
But if she didn’t hurry she would miss her shuttle.
The shuttle was a pulsed fusion rocket, and they would reach Earth the day after tomorrow. And in a decent gravity the whole time, except for during the somersault.All manner of things were changing because of this sudden shrinkage of the solar system. One small result was that Venus was no longer needed as a gravity handle for rocket travel, and so it was coincidence only that had Zo’s shuttle, the Nike of Samothrace, passing fairly near to the shaded planet. Zo joined the rest of the passengers in the big skylight ballroom to look at it as they passed. The clouds of the planet’s superheated atmosphere were dark; the planet appeared as a gray circle against the black of space. The terraforming of Venus was proceeding apace, the whole planet in the shade of a parasol, which was Mars’s old soletta with its mirrors repositioned so that they did just the opposite of what they had done in front of Mars; rather than redirect light onto the planet, they reflected it all away. Venus rolled in darkness.
This was the first step of a terraforming project that many people deemed mad. Venus had no water, a stupendously thick superheated carbon-dioxide atmosphere, a day longer than its year, and surface temperatures that would melt lead and zinc. Not a promising set of initial conditions, it was true, but people had begun to try anyway, humanity’s reach continuing to exceed its grasp, even as its grasp became godlike; Zo thought it was wonderful. The people who had initiated the project were even claiming it could happen faster than the terraforming of Mars. This was because the complete removal of sunlight had profound effects; the temperature in the thick carbon-dioxide atmosphere (ninety-five bar at the surface!) had been dropping by five K a year for the last half century. Soon the “Big Rain” would begin to fall, and in just a couple hundred years the carbon dioxide would all be on the planet, in dry-ice glaciers covering the low parts of the surface. At that point the dry ice was to be covered by an insulating layer of diamond coating or foamed rock, and once sealed off, water oceans would be introduced. The water was going to come from somewhere else, as Venus’s natural inventory would cover it to a depth of a centimeter or less. The Venusian terraformers, mystics of a new kind of viriditas, were currently negotiating with the Saturnian League for the rights to the ice moon Enceledus, which they hoped to drive down into Venusian orbit and break up in successive passes through the atmosphere. This moon’s water once rained onto Venus would create shallow oceans over about seventy percent of the planet, entirely covering the wrapped carbon-dioxide glaciers. An atmosphere of oxygen and hydrogen would be left in place, some light would be let through the parasol, and at that point human settlements would become possible, on the two high continents Ishtar and Aphrodite. After that, they would have all the remaining problems of terraforming that Mars had been dealing with, and they would also have the very long-term, specifically Venusian projects of removing the CO2 ice sheets from the planet somehow, and also imparting enough spin to the planet to give it a reasonable diurnal cycle; for the short term, days and nights could be established using the parasol as a giant circular venetian blind, but in the long run they did not want to rely on something so fragile. With a quiver she imagined it: some centuries hence, a biosphere and civilization established on Venus, the two continents inhabited, the beautiful Diana Rift a fair valley, billions of people and animals— and then one day the parasol knocked awry, and ssssss, a whole world roasted. Not a happy prospect. And so now, even before the massive flooding and scouring of the Big Rain, they were trying to lay metallic windings as physicalized latitude lines around the planet, windings that would, when a fleet of solar-powered generators were placed in fluctuating orbits around the planet, make the planet in effect the armature of a giant electric motor, the magnetic forces of which would create the torque that would increase the planet’s spin. The system’s designers claimed that, in about the same time it would take to freeze out the atmosphere and drop an ocean, the impetus of this “Dyson motor” could speed Venus’s rotation enough to give the planet a weeklong day; so there they would be, in perhaps three hundred years, down on the transmogrified world, planting crops. The surface would be massively eroded of course, and still very volcanic, with carbon dioxide trapped under the seas ready to burst out and poison them, and weeklong days cooking and freezing them; but there they would be nevertheless, everything stripped, raw, new.