Chapter One

1.1

"If you forget everything else, remember the most important fact about this planet: Mars has a million ways to kill you."

Lieutenant Mpondo swept his gaze over the twenty new arrivals. Sean Doe, in the fourth and last row, met his dark brown eyes without smiling, nodding, or blinking. Sean was over fifteen years old, and for most of that time people had been trying to kill him.

Sean and the nineteen others -- all of them adults -- sat strapped in, since theArgosywas still in space and they were weightless. Mpondo, a man of twenty-five with his hair cropped to a shadow on his skull, hovered with his feet just off the deck, a wall belt looped around his waist to keep him from drifting. He wore the orange uniform of the Interplanetary Service. It was the worse for wear, but after more than a year of traveling, the same could be said for everyone's clothes. Mpondo opened a panel and pressed a button, and the viewport, a ten-foot square 3-D screen, cleared to give them a view of space.

And of Mars, closer than ever before.

The ruddy reddish-orange disk nearly filled the viewport. The hemisphere of the planet that Sean could see lay in full sunlight. Mars looked like a ravaged world, all her blemishes showing: long shadowed cracks that were really canyons deeper than any on Earth, impact craters, a south pole ringed with an icy white cap, blurred haze. Someone in the front row murmured and pointed as a falling meteorite sketched a brilliant line across the planet near the polar ice cap.

"Just a delivery," Mpondo said in a loud voice. "That's ice, coming in from the robot mass driver on Jupiter's moon Ganymede. Approx-imately twice a day the mass driver fires a projectile of compacted ice in an orbit that whips it around Jupiter and sends it to Mars. After a journey of years, the projectile comes into the Martian atmosphere within twenty degrees of the south pole -- yes?"

A man in the row ahead of Sean had his hand up. "How big are these things?" he asked.

"On Earth they would mass about twenty-five tons," Mpondo replied, looking mildly irritated at the interruption. "And to answer your next question, they pose no threat to Marsport. They don't come anywhere near the base. Their orbits bring them in at a shallow angle over the south polar regions, where they mostly evaporate -- because of the heat of entering the atmosphere -- before they even reach the surface. They've been crashing into the Martian atmosphere for more than thirty years now, adding water, carbon dioxide, and other gases to the planet. As a result, the Martian air is growing denser. One day it will be rich enough in oxygen to allow you to breathe on the surface, and thick enough to hold the sun's heat. But that day's a long time off."

Sean could make out cloud patterns in the atmosphere of Mars, swirls and sweeps of pale color, and he noticed now how the edges of the planet blurred to blue haze against the darkness of space, unlike the sharp lines of Luna, the Earth's airless moon, where he had trained for the trip to Mars.

Mpondo was holding up a finger. "Right now, if you tried to breathe the atmosphere on Mars, it would kill you." He held up another finger. "Right now, if you took an unprotected stroll outside of Marsport, you would freeze to death. Right now, if Marsport didn't receive regular resupply from Earth, the colonists would starve. I could go on, but I think that makes the point. Mars is a deadly world."

A new world, though,Sean thought. He felt strange just contemplating his trip -- no, his escape -- from Earth. His chest tingled as he reflected on being among the first humans to live on a different planet from Earth, from the homeworld. So Mars was deadly? So what? Bring it on.

1.2

Sean could not remember his parents. He could barely remember his rescue. He was one of a dozen survivors of the Aberlin tragedy, an act of biological terrorism that had erased a small Scottish town from existence. They told him he had been two when the attack happened. He vaguely remembered the American team that had found him and had flown him, isolated, across the Atlantic.

He remembered the endless stream of doctors who had jabbed and bled him, X-rayed and imaged him, tested and prodded and poked him, trying to learn why he had lived when hundreds of others had died. He was a specimen to them, nothing more.

Sean supposed he had been about eight years old when a court had ordered his release. That's when he had been given a name. Previously he had been AVS-3, Aberlin Village Survivor Three. The American media had decided to call him John Doe. When he had learned what that meant, a generic term for an unknown, he had changed it just enough to make it his own: "Sean" was Scottish for "John," and so he had become Sean Doe.

The government had placed him in a foster home, and within a month he had escaped from it. For three years he had survived in the urban jungle of Deep New York, where gangs of young thugs faced down everything law enforcers could throw at them. And he had survived.

At eleven, he was illiterate, underweight, and sick with half a dozen diseases of poverty. Then Dr. Simak had tracked him down at last.

Of all the doctors who had examined him, Dr. Amanda Simak was the only one that Sean had halfway trusted. And, as it turned out, she was the only one who seemed to care whether AVS-3 lived or died. She had found him in a burned-out storefront, wounded and ill, and had taken him, not to a hospital or to an institution, but to her home. She had treated his wounds and his sicknesses, had taught him to read, had learned how intelligent he was. More importantly to Sean, she had legally adopted him.

All in one year.

Sean could remember that period of seventeen months, from the middle of his eleventh year to his thirteenth, as an interval of security in a life of danger. For the first time in his life, no one had been trying to hurt him. For the first time in his life, he had trusted an adult.

And then she had broken the news one morning while they sat on a jumble of boulders overlooking the stream that flowed near her home in the mountains. "Sean, I'm going away."

He had not protested, and he had not cried. He had never cried in his life. "Where?"

She had pointed up into the blue sky of Earth and smiled. Amanda Simak was forty-two, a tall woman, with light brown hair and a plain, thin face made lively by the bluest eyes Sean had ever seen. "Mars."

"Take me."

She had shaken her head. "Not yet. You're too young. But when the time comes -- "

"What will happen to me?"

She took one of his hands. "Not another foster home. I have friends who live in Florida. That's very different from here, but I think you'll like it. The Marsport Commission has agreed to consider sending young people to the colony, but that's in the future. When you can come, I'll send for you."

And that was that. The couple in Florida, the Thomases, were much younger than Dr. Simak, and they tried their best. Sean learned to swim in the sea, and to fish and sail. They worried because he never laughed, never cried, never showed any sign of temper.

But they didn't realize how little they knew about what he was feeling. Sean had a gift he could not explain or fully understand. It was a mental ability to put together trends, facts, and forces and predict what would happen.

He watched the news and studied history. He learned of the forces in Old Europe, South America, Central Asia, Africa, all warring for their rights, their wishes, their desires.

In his head, lines of force intersected, changed direction, grew more intense.And Sean knew something would happen in three to five years. Something terrible.

He never spoke of it. After Dr. Simak had arrived to take charge of Marsport, he never told even her. Their communication was odd, to be sure. Mars was so far from Earth that it took half an hour or more for transmissions to travel from one planet to the next. Instead of conversations, they had a series of monologues. Dr. Simak would appear on the monitor, smiling, saying, "Hello, Sean. Here's the news from Mars," and then would talk for ten or fifteen minutes. When she had finished, Sean would reply for about the same length of time, then transmit. And in thirty or forty minutes, she would get his reply.

But he never told her what he saw coming.

They had been apart for well over a year when she sent word at last: "You can come." He traveled to Luna, Earth's moon. The colonists there called their underground warren "Lunacy," and they called themselves "Lunatics," but always with a grin. They had given Sean a crash course in Martian survival, and they had seen him aboard the Argosy for the long trip through space. Sean had never once complained.

By then he knew, although he could not quite express how he knew, that for Earth, time was running out.

1.3

TheArgosywent into orbit a hundred miles above the surface of Mars. The new colonists flew down to Marsport in three landers sent up from the surface, each able to carry only six passengers. Sean's chance did not come until the last day, when he and five others were cleared for landing. He never got a clear glimpse of the lander he was boarding, but from his training back on Luna he knew that it was shaped something like a flattened cone.

He had a window seat, and he stared out of a very small viewport as the craft dropped into the upper reaches of the Martian atmosphere. The lander turned, coming in tail-first at this altitude. Turbulence jolted and jarred him, and he heard the other colonists murmuring in tones of worry, but he held on and stared out the window. The distant landscape gradually grew closer and more distinct until they were sweeping over a chaotic world of craters, boulders, vast gullies, and wind-whipped sheets of sand.

Then the lander rotated, and Sean caught his breath. He could see the immense dome of a mountain, one far larger than any on Earth: Olympus Mons, an enormous dead volcano that towered fifteen miles high.

Somewhere at its base was Marsport.

It took the lander another hour to pass over the gigantic mountain and touch down on a landing pad, a stretch of bare red rock that had been scraped smooth. The return of gravity, even the weak gravity of Mars, felt strange to Sean. Like everyone else on theArgosy,Sean had put in several hours a week in the centrifuge, a rotating cylinder that gave the effect of gravity. That was necessary because being too long in weightlessness tended to weaken a person's bones and circulatory system. Still, that had been temporary and artificial. Now, as he stood up from his seat, Sean felt the tug of a planet again. On Earth he had weighed a little over one hundred pounds. Here it was more like forty-three, but after the weightlessness of space, he felt as if he were wading through molasses.

The passengers filed forward through a hatch into a sealed disembarkation tube, a long, slanting ramp without windows. At the far end was a corridor lighted by fluorescent panels, and at the end of the corridor Sean stepped into a dome that gave him a sense of spaciousness.

It was thirty meters -- about a hundred feet -- in diameter. And two-thirds of its walls were viewscreens.

He nearly bounced as he made his way over to look out of one of the screens -- getting back the habit of walking properly was difficult. He steadied himself and stared out at the Martian plain. He had expected a pink sky, but it was blue; a deep, clear blue. Some distance away, a rugged cliff rose up and up, and beyond that were the slopes of Olympus Mons itself. Sean felt a little drop of disappointment. The mountain was so far away and so vast that it faded into a purple, hazy blur. He wasn't even sure that he could see the summit --

"Sean."

He turned at once and felt his throat tighten.

Dr. Simak stood a few feet away. She was wearing a light gray tunic with pockets everywhere, darker gray slacks, and black boots. Her lined face was smiling, and her blue eyes gleamed with tears. "I've waited a long time to see you again."

Sean lurched toward her, nearly falling. He hugged her tightly. "I'm glad to be here," he said, his voice a rough whisper.

1.4

Sean shifted in his seat. He had been on Mars for less than an hour, and now he was waiting with the other newcomers in a classroom for an orientation session.

A blond girl wandered in, spotted him as the only teen in the whole group, and came to sit beside him, making herself right at home. "Jenny Laslo," the girl said, offering her hand. As Sean shook it, she frowned and asked, "What kind of outfit is that?"

"It's mine," Sean said, surprised. He was wearing a dark blue V-neck shirt, baggy trousers, sneakers, and over it all his favorite leather jacket, black and very long so that it hung to his knees. Jenny, he noticed, was wearing the standard gray tunic, black slacks, and boots. He frowned. "What's wrong with my clothes?"

"Well, nothing. They're just a little unusual.

Not that we have a uniform or anything. So who are you?"

"Sean Doe."

Jenny's eyes, which were a light blue, widened. "TheSean Doe? The one Dr. Simak adopted?"

"Yes," Sean said shortly. He dreaded the questions that would come next, about his real parents and how he had lost them.

"Ice," Jenny said.

"What?"

"Ice," she repeated. "You know -- the coolest. She's a great person. So what's your specialty?"

Sean shook his head. "I don't have a specialty," Sean said.

"You'll get one. Me, I'm in adaptive agriculture. You know, studying how plants and animals adapt to nonterrestrial conditions. I'll introduce you to the rest of the brat squad later. First you have to do the 'Mars will kill you' bit."

"Done it already," Sean told her. "Lieutenant Mpondo on theArgosy.Twenty lectures, all of them winding up by reminding us that Mars wants us dead."

Jenny tilted her head. "No, it doesn't. It doesn't care, that's all. Remember that, and you've got the most important thing spiked from the beginning. Mars doesn't hate you. It just never forgives a mistake. Simple, right?"

Some of the adults who had made the flight with Sean came in and found places near the front of the classroom. Jenny jerked her head toward the door. "Ax the class. You don't need it if you're not specializing yet."

Sean had been wondering how he was going to cope with another round of information about all the dangers of Mars. He grinned. "Okay."

The two of them walked out with considerably more grace than the adults who were shuffling down the corridor holding on to wall rails as they tried to readjust to gravity. Sean followed Jenny down a maze of passageways. She seemed to know everyone they passed, and they all spoke to her. She finally led Sean into the biggest dome he had seen, this one a clear greenhouse more than two hundred meters across. Jenny was grinning at him. "This is ice. Well, it's water, not ice, but it's the coolest. Lake Ares."

For a few seconds Sean wasn't quite sure what he was seeing, and then everything clicked. "It's a crater," he said.

They stood on the edge of a body of water so calm that it looked like a sheet of glass. It was almost perfectly round. The afternoon sunlight slanting in glistened on its surface, making it a blue shimmer. "It's the only body of water on Mars," Jenny said. "Maybe one day they'll let us swim in it. Meanwhile, it's got a few fish and a great way of splashing." She sat at the edge of the water, swept a hand down and slapped the surface.

In the low gravity, a spray of water rose into the air, then fell as if in slow motion. Undulating waves broke out on the surface of the lake, rolling across the water in lazy expanding circles. "Where does this come from?" Sean asked.

"Ice mines," Jenny responded. "Well, not really, but that's what we call them. Mars has a pretty good store of permafrost -- water that's under the surface and permanently frozen. When Olympus was erupting, it shot out a lot of water vapor. That condensed and fell as rain -- the atmosphere used to be thick enough for that -- and the water seeped down underground. When the first engineers were making the tunnels, they hit pockets of permafrost. Later, when the Marsport project started, some of them domed in this crater and began melting the permafrost and pumping the water in to create this reservoir. It's more than thirty meters deep at the center. We haven't had to draw on it for drinking water yet. We probably will soon, because the permafrost that's within reach is about played out."

Sean watched as the slow-motion waves reached the far shore, then rebounded, coming back their way. "What about the ice at the South Pole?"

"The meteorites, you mean?" Jenny shrugged. "That's mostly for the sake of the atmosphere. As the meteorites evaporate, they add water vapor, nitrogen, oxygen, and carbon dioxide to the air. You know the air pressure today is thirty times what it was in 2050? In some of the rifts, the pressure's up to three hundred millibars, but that's still not much. Maybe you know that on Earth, standard sea-level pressure is one thousand thirteen millibars. Still, we get clouds all the time now. Maybe in fifty more years we'll get rain. Or snow."

Sean stared out at the surface. Long shadows were creeping across the rusty red plain. The afternoon sun shone on a complex of domes, towers, and antennae. A half-dozen people in pressure suits were working out there, clearing boulders from a stretch of ground between the dome Sean and Jenny stood in and the next one. "When do we get out?" Sean asked.

"Oh, you won't be able to go outside for a couple of weeks," Jenny said. "Not until you learn all about the dangers of the surface. But you can sum them up pretty easily."

"I know," Sean replied solemnly. "Mars has a million ways to kill you."

They looked solemnly at each other for ten seconds. Then Jenny began to laugh, and to his own astonishment, Sean joined in. Like gravity, laughing felt very strange. Good, but very strange indeed.

Chapter Two

2.1

"What are you doing here?"

The voice startled Sean, and he turned quickly -- too quickly in the low gravity of Mars. He couldn't stop and went sprawling onto the sandy edge of the lake. He scrambled up, teetering for balance, and fell forward again -- into the arms of an angry-looking man, who set him on his feet.

Jenny was speaking fast in an anxious tone. "We weren't doing anything, Dr. Ellman. Sean's new, and I was just showing him -- "

Ellman was a heavyset man in his thirties, with black hair cut close to his head. Everything about him was square: his broad shoulders, his thick body, his heavy chin. He scowled at both of them from dark eyes set deeply under heavy brows. "If he's new, he should be at the Asimov Project orientation. What's the name?"

"Sean Doe," Sean said, meeting the man's unpleasant gaze.

A smile that looked more like a sneer crinkled its way across Ellman's lips. "Yes," he said. "I've heard of Sean Doe. The ward of Dr. Simak, I believe.

She will not be pleased to hear how you're beginning your stay on Mars, Doe. Or how Laslo here is contributing to your rule-breaking."

"It isn't her fault," Sean said. "It's just that I've heard these lectures before, and I asked her -- "

"Heard them before?" Ellman cut in. "Oh, so you can read minds, can you? You're sure that you know everything that can possibly be presented to you? Tell me, if you're so certain, how much of our power is provided by areothermal wells and how much by wind generation?"

Sean stared stupidly at him. "I -- uh, I don't know."

"No. How many kilometers of lava tubes have we adapted for storage, power generation, and factory space?"

Heat crept upward from Sean's throat into his face. He tried to control his anger at these unfair questions and merely shook his head.

"Is that an answer, Doe?" snapped Ellman.

"No, sir," Sean said. "I don't know."

"We have 3,212 colonists at the present time. At a standard rate of consumption, disregarding recycling, how many months' water supply do we have?"

Jenny whispered, "Six."

But Ellman whipped his head toward her. "I heard that, Laslo! You're confined to quarters for the rest of the day. Doe, come with me."

Sean gave Jenny a helpless look, and she shrugged an apology. The three of them traveled down a corridor to an intersection, where Jenny split off to the left. Ellman said, "I suppose you know about the color-coded doors, Mr. Doe?"

That was a question Sean could answer. It had been part of the training on Luna. "A red-coded door means the room has an opening onto the Martian surface," he said. "If the room loses pressure, there's no way anyone could survive inside. A yellow-coded door doesn't have a wall that adjoins the surface, but no resupply of air. If there's a breach to the surface, the room will hold air and anyone in it would be safe for as long as the air held out. A green door means the room has a constant supply of -- "

"At least you know something."

Sean plowed on. "The doors don't open automatically because they have to be heavy in case of a pressure loss, and the power needed to open and close them -- "

"When I want to know that, I'll ask you," snapped Ellman. He marched Sean for what seemed like miles until they came to a dome with a sign reading ADMINISTRATION above the entrance. Around the perimeter six doors were arranged. Ellman made for the one farthest from the entrance to the dome and pressed his hand against a plate beside the door.

It opened, and they stepped into a small office. Amanda Simak sat at a desk studying a holographic projection that hovered above her computer console. "Yes?" she asked without looking away.

"This young man has committed a serious breach of the rules," Ellman said stiffly.

Amanda looked up, her expression stern. It changed to one of surprise when she saw who the culprit was. "Sean? What's he done?"

Ellman explained, making it seem as if cutting a lecture was the equivalent of armed robbery. When he finished, he added, "I'd suggest confinement for at least a week."

Amanda nodded grimly. "I will consider your suggestion, Dr. Ellman. Thank you. You may leave us alone now."

With a final scowl at Sean, Ellman turned and strode from the office. As soon as the door had closed behind him, Sean said, "I didn't mean to cause any trouble -- "

Amanda shook her head. "Of course not. But you've had lectures enough to last a lifetime on the trip from Earth. I know." She touched a pad near her computer and the holographic display -- a maze of red and green corridors connecting red and green domes -- faded. Another touch of the pad, and a section of the wall behind her cleared, becoming a window looking out onto the afternoon landscape of Mars. Long shadows stretched away, twinkling with frost.

"That's what interests you. A new world."

Sean nodded. "I met a girl, and she was going to show me around."

"What girl?"

"Her name is Jenny. Jenny Laslo."

Amanda smiled. "Yes, she's one for bending the rules herself. Sit down, Sean."

Sean sat in the only other chair in the office, on the other side of the desk from Amanda. She sighed. "Well, we won't be too harsh on this first day. However, you will have to cooperate, Sean. I don't know if you're aware of how controversial the Asimov Project is."

Sean shrugged. "It's just a few teenagers."

"More than that," Amanda told him. "Twenty young people, between the ages of thirteen and eighteen. You got the very last spot in the project, Sean. You should know that there are many on Earth who say that the dangers we face are too great to allow us to risk the lives of young people. Others say the whole effort is a waste and that Mars can never be a home to humans, so sending anyone here, let alone youngsters, is futile. We intend to prove the doubters wrong. The purpose of Marsport is to test whether Mars can ever be fully colonized by humans. Our task is to prove that we can survive for one Martian year -- do you know how long that is?"

"Six hundred and eighty-seven Earth days," Sean said. It was a figure he had heard over and over during the long voyage from Earth.

Amanda nodded. "Very close. Actually, 686.98 Earth days. The Martian day is a little longer than an Earth one -- 24 hours and 37 minutes, approximately -- so in Martian terms, the Martian year is 651.17 days long. That's a long time, Sean. A very long time for a colony to be independent from Earth."

She put her hands together, making a steeple of her fingertips. "We believe that the Martian colony has to reflect a real community, just as the lunar colony now does. A real community includes teenagers and even children. The Asimov Project is very expensive, Sean. That's why the selection process was so difficult. And that's another reason people on Earth object. For what it cost to send you to Mars, the Levelers say, a thousand poor children on Earth could be fed, clothed, and housed for a year."

Sean shook his head. "There'd be no point. Things are falling apart on Earth."

"I know they are," Amanda said. "The trouble is that the governments of Earth are too stubborn to admit it." She rose from behind her desk. "All right. You have to learn to live with rules, Sean. Dr. Ellman isn't very diplomatic, but he's right about some things. Do you understand?"

"I guess so," Sean said. "It's just that -- well, I've been on my own for so long. But I'll try. And I'll take my punishment."

Amanda looked satisfied. "I appreciate that attitude. Confinement to your dormitory wing for the remainder of the day and night. And tomorrow you will attend the orientation sessions. Is that clear?"

"Yes."

"You're dismissed."

2.2

It wasn't quite so simple. Marsport seemed vast and confusing, and finally Amanda walked with Sean to the same intersection where Jenny had turned away. "Your dormitory section is to the right," Amanda said. "Your room is A4-5. That's Asimov section, fourth group, fifth room. Clear?"

Sean glanced at her. "A green-coded door," he said.

Amanda gave him an odd look. "Yes, it is. All the dormitories are green-coded. Anyway, your luggage should be there already. Better hurry, or you'll miss your dinner."

Sean made his way down another corridor. He could hear voices from ahead. He opened the heavy green-banded door and stepped into an open area ten feet across and thirty feet long. Four teenagers sat at a table, eating and talking. They fell silent when he stepped in. One of them rose and gave him a brilliant smile. "Sean Doe, I'll bet! Your travel case showed up half an hour ago. We've already gone through it." He grinned. "Just kidding. But we're supposed to expect a Sean Doe, and you must be him."

Sean nodded, uneasy to be meeting these new people.

The boy who had spoken was African, perhaps one year younger than Sean. He was slim, a little shorter than Sean, and quick in his movements. "Grab some chow and sit down! I'll introduce your cellmates! I'll start with me, since I'm the leader."

The others jeered him good-naturedly. "Okay, okay," he said, still smiling as he sat down again. "I am only a legend in my own mind. I'm Alex Benford, and one day I'm going to be the hottest pilot on Mars."

"Uh, glad to meet you," Sean said. "But where's the food?"

"New man! New man!" said an Asian youth.

He jumped up. "Come this way, Sean, and I'll show you. And don't let Alex fool you. I'm the oldest, so I'm the leader of this crew. My name's Patrick Nakoma, I'm eighteen -- the old man of the Asimov Project, thank you very much -- and I'm in zoology. That means I help take care of the animals we're trying to adapt to Mars. Here we go, this is the mess module."

Sean realized that this area was almost exactly like the Administration dome -- a large central space with rooms opening off it -- and followed Patrick into a hexagonal room. "Here you go," Patrick said, opening a panel in the wall and pulling out a tray. "This is the food. Pop it in here." He slid the tray into another panel and in ten seconds it popped back out again. "Now it's cooked. Utensils are here." He opened still another panel and produced a knife, fork, and spoon. "Glasses are here, and this dispenses your drink. Today it's synthetic chocolate milk, water, or lemonade."

Sean chose the chocolate milk and took his tray back to the table. Patrick showed him how the lid lifted off and folded under. The meal was chicken, vegetables, and a roll. Sean's mouth began to water at the aroma, and he dug in as Alex continued. "Before I was rudely interrupted by Mr. Nakoma there -- aren't you retiring next year, old man? -- I was about to introduce your other two dorm mates. On your left is the youngest human being on the entire planet, Master Roger Smith."

"I'm thirteen," objected Roger, his accent revealing him to be British. He had untidy brown hair -- long for a colonist -- a snub nose, and a pale complexion. "That means I'm only a year younger than Alex, so pay no attention to him. I'm pre-engineering."

"Watch out for Roger," Alex warned as Sean wolfed down his food. "He's got a warped sense of humor. And last and certainly least, on your right is Mr. Michael Goldberg, another old codger. What are you, Mickey, seventy-one?"

"Seventeen," Mickey corrected. He had a plump face, curly dark hair, and -- most unusually -- round rimless glasses. "Hydraulics specialist. And before you ask, I can't have corrective surgery and I hate contact lenses, so I wear specs. What's your specialty, Sean?"

Sean gulped some synthetic chocolate milk, which tasted almost completely unlike real chocolate milk. "Don't have one yet," he said.

They waited for a moment, and then Alex asked, "How old are you?"

"Fifteen and six months," Sean replied.

"And how many days?" Roger asked with a grin. "No, I'm just joking with you. Go ahead and eat. You look starved."

Though he had shown up late, Sean was so hungry that he finished his dinner along with the others. They showed him how to return the tray to yet another compartment for washing, then explained the layout.

"Bathroom and shower are in the module to the right of the mess module," Alex said. "Computer library and rec module is the one to the left. Then our rooms, which I'm sure you're going to love just as much as we do. Patrick's in number one, because he showed up first. Then Mickey in two, me in three, and Roger in four. Yours is five, right over there. And the last one, in case you're interested, is the laundry. We do our own. Oh, what we sacrifice to be a part of the Asimov Project!"

2.3

The room wasn't very impressive, Sean had to admit. It was hexagonal, like all the others, and was perhaps eight feet in diameter. The desk, with its own small computer, was beside the door. The chair folded out from the wall. Storage shelves occupied three of the other five walls. One wall was actually a closet door -- he unpacked his clothes and hung them there -- and the last one folded down to become a bed.

The others were playing some complex computer game in the common room and invited him to join them, but he begged off, explaining that he was tired. "Anyway, I'd better go to my room," he finished. "I'm sort of confined to quarters."

"Why?" Roger asked, sounding surprised.

Sean explained the trouble he had landed in.

The others looked at each other, shaking their heads. "Man, you got off on the wrong foot," Alex said sympathetically. "Ellman's a real pain. You have to watch out for him, or you'll be on the first shuttle back to TF."

"TF?" Sean asked.

"Terra firma," Mickey explained. "Otherwise known as Earth. Ellman's a stickler for rules."

"Most of which he makes up on the spot," Patrick put in. "That's just to keep us on our toes."

"I'm terrified of him," Roger said.

Sean stared at the younger boy. "Really?"

"Well," Roger said with a grin, "at least I'm always sure to leave no clues when I pull something on him. Seriously, though, Ellman hates the Asimov Project. I think he's secretly a Leveler."

"I hate Levelers," Sean said.

"I think they're a bunch of nuts who just think they're important," Mickey added with a shrug.

"Besides," Roger said with a grin, "what did they ever do to you?"

"They killed my parents," Sean said evenly. "I was born in Aberlin."

Roger gaped at him. "No way!"

"I was."

Alex was no longer smiling. "I guess I wasn't paying attention. What's Aberlin?"

Roger began, "It was this town in -- " He looked at Sean. "Sorry."

"Go ahead," Sean told him. "It's in the past now."

In a lower voice, Roger said, "Aberlin was a small town in Scotland. It had about the same number of people in it as Marsport, I think. Anyway, the Levelers hit it with a biobomb about ten, eleven years ago. They were calling for everyone not of British descent to leave the islands. Load of rubbish, but they said that if they didn't get their way, they'd destroy one town a month. Almost everyone in Aberlin died of a modified form of plague. Sean was one of the few survivors. You were raised in the States, right?"

"Yeah."

"Which explains why you don't sound Scottish. But they caught that ring of terrorists. They're all in prison now."

"Yeah," Sean said bitterly. "And my parents are still dead."

Patrick put a hand on Sean's shoulder. "This is a new world," he said. "A new beginning."

2.4

Sean turned in a few minutes later. With his door closed, he couldn't even hear the others. He knew they'd be talking about him, though -- the only Asimov Project kid to come in on this flight, and the last one scheduled to come to Mars. They might even be feeling sorry for him.

The bed felt strange at first. During the whole flight out from Earth, for many months, Sean had slept in a pressure web, a zero-gravity sleeping bag made up of elastic tubing that alternately inflated and deflated, the kneading massage keeping his muscles toned and his circulation healthy.

But he had slept in worse places. He could remember nights in burned-out cars, shivering nights in the scant shelter of a couple of loose boards, nights on pavement, on mounds of garbage, in downpours.

Well, now at least he had his own room, even if it was gray and exactly like every other bedroom on the entire planet. And he had friends.

If he could trust them.

Sean drifted to sleep, and for some reason he dreamed of his first foster family. They had invited media reporters to interview Sean. He had learned later that they charged for the interviews. The two of them hadn't been a very happy couple, though when the cameras were on them, they were smiling and looked cheerful.

But every night Sean had gone to bed listening to them screaming at each other. And every morning he had dreaded getting up to their complaints and sometimes their blows. Both of them were quick to hit if he put a toe out of line.

Now, in his dreams, he heard them screaming:

"We could have held up United News for twice what you got!"

"You moron! Who'd pay that much to broadcast the brat saying he doesn't remember the attack? It's old news now!"

With a gasp, Sean sat up in the dark, nearly tumbling out of bed. At first he felt confused, his head reeling. Then it came back to him: Gravity was different here. It was a different world, a new start. It was Mars.

Marsport was a grand experiment. Earth was overcrowded, bickering, on the verge of breakdown. If a new world could be opened, then the people of Earth would have hope for the future. It had taken years of work to build and equip the colony. Now the goal was for it to exist without any kind of resupply from Earth. It had to do that for at least one full Martian year before it would be considered a success. Then, once the colonists had proved that it could be done, others would come from Earth to make Mars a planet where humans could live permanently. But that all hinged on the population of Marsport surviving for one full Martian year with absolutely no food or equipment coming from Earth in that time. If everything went right, the experiment in survival would begin in just a few months.

Sean settled down again, pulling the blanket back over himself.

Survival.

He was pretty good at that.

Excerpted from Marooned! by Brad Strickland, Thomas E. Fuller
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