Climbing Olympus. Kevin J. Anderson

were remaking an entire world! This had been his dream since his adolescent years.

      Rubbing his black-brown eyes in the lounge’s dry recirculated air, Keefer stretched out to touch the insulated wall of the ship. He pushed away from the port, drifting toward the center of the room. Ogawa and Shen claimed his space to ogle the planet once more.

      History would eventually imbue the Mars project with the grandeur it deserved, although the apathy shown by Earth’s general population frustrated Keefer. People had no patience for long-term projects. What was a hundred years or so in the grand scheme of things? The universe itself would blink its eyes in astonishment at how Sol’s frozen fourth planet had suddenly exploded into life.

      Long before Keefer had even been born, governmental huckstering had finally brought about a flags-and-footprint manned mission to Mars that managed to accomplish real science as well as take care of the political obligations for worldwide viewers, including the “For All Mankind” plaque.

      But during the years of preparation and the actual landing, the world’s space agencies carefully avoided the question of what to do next. Was Mars destined to be a dead end, a dusty trophy like the Moon? The red planet had enormous resources, but the sheer distance and the travel times involved made it unlikely that anything available there could make a difference to lives on Earth.

      Seeing that the governments did not have their hearts in exploiting Mars, multinational corporations scrambled to put together their own resource expeditions. Though Keefer had no love for the sheer-profit-motivated industrial mindset, he did credit the multinationals with finally forcing the UN Space Agency into action, to secure a beachhead on Mars before the companies could. In a bold move UNSA absorbed and adopted the other fledgeling programs, arm-wrestled all the competing work into a pool of combined resources, and secured the backing of the major governments. Riding the wave of support, UNSA struck out on a century-long program to make the fourth planet more like Earth, to change its hostile environment so that people could live there.

      The terraforming process would be costly, but no more so than a handful of short-term missions to Mars. Terraforming involved merely a lot of time, a lot of tedious long-distance maneuvers, remote operations—and thinking on scales larger than anyone had ever tried before. …

      Keefer found a coffee tube in the wall locker, pulled the zip-tab that made it heat itself, then sucked on the nozzle, careful not to burn the inside of his mouth. He frowned at the taste—he had accidentally removed a tube with cream-and-sugar flavoring. “Want this?” he asked Tam, who took it from him, brushing his dry fingertips with hers, but he was too preoccupied to notice her flirtations this time. Keefer rummaged in the wall locker again until he found a tube marked CREAM ONLY, and sipped idly.

      Back at the viewport, shoulder to shoulder with the other four, Keefer saw how the orbit had carried them over Mars. Below stretched the gouge of Valles Marineris, the “grand canyon” of Mars, miles deep in places and wider than the entire United States. In the northern highlands, a giant whitewashed crater marked Encke Basin, the scar left by one of the comets that had been hurled into Mars as the first step in the terraforming process.

      UNSA had undertaken a rendezvous mission to Encke as the comet whipped close to Earth on its 3.3-year orbit, detonating precisely positioned nuclear warheads that sent Encke straight to Mars, where it grazed the atmosphere, aerobraking to slow its descent. Thus it burned up and dumped its contents into Mars’s atmosphere rather than ionizing all the gases into space. The comet strike brought with it cubic miles of free water, as well as enough energy of impact to warm the atmosphere. The shock wave and the heat imparted by the collision released an additional four times Encke’s water vapor from the soil into the air.

      The resulting Encke Sea had volatilized in only two years, but the changes in the Martian atmosphere were permanent. The upset in the climate and the brief greenhouse effect melted part of the ice caps, which increased the atmospheric pressure further, which melted more. …

      The escalation had begun. Mars had been locked in an unsteady climatic equilibrium, waiting for a shove from ambitious humanity.

      A year later two transports released samples of airborne algae—voracious for carbon dioxide—into the Martian atmosphere. The algae included a dozen different varieties genetically engineered to thrive on Martian conditions. They soaked up the weak sunlight, gathered minerals from the ever-present fine dust that whipped through the air, settled on exposed surfaces, and released bound oxygen. All this laid the groundwork for a terrestrial ecology. Two years later another cargo ship dumped more algae into the air, new strains. Monitors showed measurable improvements in the air concentrations.

      That was the year Keefer had been born.

      Six years after that, new algae and free-plankton strains were deployed, tweaked to optimize their metabolism in the changing environmental conditions, while the first species grew obsolete in an atmosphere becoming too rich for them.

      Nineteen years after the first cometary impact, a second iceball crashed into Mars. The long-period comet Harlow-Burris, previously undiscovered, roared down into the solar system in an orbit that would take it astonishingly close to Mars on its trip through the ecliptic plane. A frantic mission was set up to give Harlow-Burris a nudge and change its course just enough to smack it into Mars, dumping more water, adding more heat, freeing more of the locked moisture and oxygen buried beneath the sands and hydrated within the rocks.

      During Earth’s worldwide recession, when Keefer himself began working as a student in planetary geology, most of the cost-intensive terraforming work ground to a halt, but the wheels of nature had already been set into motion. Algae strains continued to swarm over the planet, making the Martian atmosphere thicker in the lowlands, trapping more sunlight, reducing the rocks and the oxide soil.

      When humans again set foot on Mars after an eighteen-year hiatus in manned missions, things had changed dramatically. Preparations for a permanent UNSA base were made. Living modules were sent by slow cargo ships, for automatic landing and robotic assembly. Supplies were delivered in cheap but slow trajectories, preparing for the day when people could establish a long-term presence.

      As he continued his headlong drive for Mars Mars Mars, Keefer had tried to engender in his twenty-year-old son Allan an appreciation for the magnitude of the terraforming task. Keefer spent two months a year with Allan, who feigned interest whenever he talked to his father; Keefer felt sorry for Allan, because the boy had no burning goal. But Keefer vowed that when he finally set foot on the surface of Mars, waving his gloved hand at the cameras for newsnets back on Earth, Keefer would be waving at Allan and no one else.

      The boy was entering college, where he would probably study space science because Keefer had opened all the right doors for him, planned out his courses, urged him to follow a good curriculum, pointed the way. Keefer had worked hard to ensure that his son’s future was established, since his own new job as commissioner of Lowell Base would keep him away for years. Keefer promised himself he would pay the price just to make sure Allan had a clear trail of footsteps to follow. …

      Now, hand over hand, he pushed his way to the orbiter’s bridge. Captain Rubens sat back with all lights down except for the instrument panels, enjoying the best view available on the craft. The cherub-faced captain bore a wistful expression: he would not be going down to the surface with the rest of them.

      Rubens swiveled around. He wore a bulky green sweatsuit and thick socks to insulate him from the ever-present chill on the spaceship. “Ah, Commissioner! I was going to go get you. I’ve contacted Lowell Base because I thought you might want to talk to Dr. Dycek, but she’s unavailable at the moment. Think that means she’s in the bathroom, or something?”

      Keefer didn’t know yet how he was going to deal with Dycek. He had never met the woman, but her work had certainly raised enough eyebrows and thrown a monkey wrench into UNSA’s neatly planned terraforming schedule. Her surprise project had placed augmented human beings on Mars years before any other permanent presence. First the unruly adins, then the more cooperative dvas set up modular buildings and infrastructures that would have taken ordinary humans many years to complete. But though the 150 or so surviving dvas still provided a good pool of laborers,