Rama: The Omnibus

by Arthur C. Clarke

  His wives, never more than ten minutes away at the speed of light, had nothing to complain about…

  CHAPTER 17

  SPRING

  DURING THE FIRST 'nights' on Rama, it had not been easy to sleep. The darkness and the mysteries it concealed were oppressive, but even more unsettling was the silence. Absence of noise is not a natural condition; all human senses require some input. If they are deprived of it, the mind manufactures its own substitutes.

  And so many sleepers had complained of strange noises—even of voices—which were obviously illusions, because those awake had heard nothing. Surgeon-Commander Ernst had prescribed a very simple and effective cure; during the sleeping period, the camp was now lulled by gentle, unobtrusive background music.

  This night, Commander Norton found the cure inadequate. He kept straining his ears into the darkness, and he knew what he was listening for. But though a very faint breeze did caress his face from time to time, there was no sound that could possibly be taken for that of a distant, rising wind. Nor did either of the exploring parties report anything unusual.

  At least, around Ship's midnight, he went to sleep. There was always a man on watch at the communications console, in case of any urgent messages. No other precautions seemed necessary.

  Not even a hurricane could have created the sound that did wake him, and the whole camp, in a single instant. It seemed that the sky was falling, or that Rama had split open and was tearing itself apart. First there was a rending crack, then a long-drawn-out series of crystalline crashes like a million glasshouses being demolished. It lasted for minutes, though it seemed like hours; it was still continuing, apparently moving away into the distance, when Norton got to the message centre.

  'Hub Control! What's happened?'

  'Just a moment, Skipper. It's over by the Sea. We're getting the light on it.'

  Eight kilometres overhead, on the axis of Rama, the searchlight began to swing its beam out across the plain. It reached the edge of the Sea, then started to track along it, scanning around the interior of the world. A quarter of the way round the cylindrical surface, it stopped.

  Up there in the sky—or what the mind still persisted in calling the sky—something extraordinary was happening. At first, it seemed to Norton that the Sea was boiling. It was no longer static and frozen in the grip of an eternal winter; a huge area, kilometres across, was in turbulent movement. And it was changing colour; a broad band of white was marching across the ice.

  Suddenly a slab perhaps a quarter of a kilometre on a side began to tilt upwards like an opening door. Slowly and majestically, it reared into the sky, glittering and sparkling in the beam of the searchlight. Then it slid back and vanished underneath the surface, while a tidal wave of foaming water raced outwards in all directions from its point of submergence.

  Not until then did Commander Norton fully realize what was happening. The ice was breaking up. All these days and weeks, the Sea had been thawing, far down in the depths. It was hard to concentrate because of the crashing roar that still filled the world and echoed round the sky, but he tried to think of a reason for so dramatic a convulsion. When a frozen lake or river thawed on Earth, it was nothing like this…

  But of course! It was obvious enough, now that it had happened. The Sea was thawing from beneath as the solar heat seeped through the hull of Rama. And when ice turns into water, it occupies less volume . . .

  So the Sea had been sinking below the upper layer of ice, leaving it unsupported. Day by day the strain bad been building up; now the band of ice that encircled the equator of Rama was collapsing, like a bridge that had lost its central pier. It was splintering into hundreds of floating islands that would crash and jostle into each other until they too melted. Norton's blood ran suddenly cold, when he remembered the plans that were being made to reach New York by sledge…

  The tumult was swiftly subsiding; a temporary stalemate had been reached in the war between ice and water. In a few hours, as the temperature continued to rise, the water would win and the last vestiges of ice would disappear. But in the long run, ice would be the victor, as Rama rounded the sun and set forth once more into the interstellar night.

  Norton remembered to start breathing again; then he called the party nearest the Sea. To his relief, Lieutenant Rodrigo answered at once. No, the water hadn't reached them. No tidal wave had come sloshing over the edge of the cliff. 'So now we know,' he added very calmly, 'why there is a cliff.' Norton agreed silently; but that hardly explains, he thought to himself, why the cliff on the southern shore is ten times higher…

  The Hub searchlight continued to scan round the world. The awakened Sea was steadily calming, and the boiling white foam no longer raced outwards from capsizing ice floes. In fifteen minutes, the main disturbance was over.

  But Rama was no longer silent; it had awakened from its sleep, and ever and again there came the sound of grinding ice as one berg collided with another.

  Spring had been a little late, Norton told himself, but winter had ended.

  And there was that breeze again, stronger than ever. Rama had given him enough warnings; it was time to go.

  As he neared the halfway mark, Commander Norton once again felt gratitude to the darkness that concealed the view above—and below. Though he knew that more than ten thousand steps still lay ahead of him, and could picture the steeply ascending curve in his mind's eye, the fact that he could see only a small portion of it made the prospect more bearable.

  This was his second ascent, and he had learned from his mistakes on the first. The great temptation was to climb too quickly in this low gravity; every step was so easy that it was very hard to adopt a slow, plodding rhythm. But unless one did this, after the first few thousand steps strange aches developed in the thighs and calves. Muscles that one never knew existed started to protest, and it was necessary to take longer and longer periods of rest. Towards the end he had spent more time resting than climbing, and even then it was not enough. He had suffered painful leg cramps for the next two days, and would have been almost incapacitated had he not been back in the zero-gravity environment of the ship.

  So this time he had started with almost painful slowness, moving like an old man. He had been the last to leave the plain, and the others were strung out along the half-kilometre of stairway above him; he could see their lights moving up the invisible slope ahead.

  He felt sick at heart at the failure of his mission, and even now hoped that this was only a temporary retreat. When they reached the Hub, they could wait until any atmospheric disturbances had ceased. Presumably, it would be a dead calm there, as at the centre of a cyclone, and they could wait out the expected storm in safety.

  Once again, he was jumping to conclusions, drawing dangerous analogies from Earth. The meteorology of a whole world, even under steady-state conditions, was a matter of enormous complexity. After several centuries of study, terrestrial weather forecasting was still not absolutely reliable. And Rama was not merely a completely novel system; it was also undergoing rapid changes, for the temperature had risen several degrees in the last few hours. Yet still there was no sign of the promised hurricane, though there had been a few feeble gusts from apparently random directions.

  They had now climbed five kilometres, which in this low and steadily diminishing gravity was equivalent to less than two on Earth. At the third level, three kilometres from the axis, they rested for an hour, taking light refreshments and massaging leg muscles. This was the last point at which they could breathe in comfort; like old-time Himalayan mountaineers, they had left their oxygen supplies here, and now put them on for the final ascent.

  An hour later, they had reached the top of the stairway—and the beginning of the ladder. Ahead lay the last, vertical kilometre, fortunately in a gravity field only a few per cent of Earth's. Another thirty-minute rest, a careful check of oxygen, and they were ready for the final lap.

  Once again, Norton made sure that all his men were safely ahead of him, spaced ou
t at twenty-metre intervals along the ladder. From now on, it would be a slow, steady haul, extremely boring. The best technique was to empty the mind of all thoughts and to count the rungs as they drifted by—one hundred, two hundred, three hundred, four hundred…

  He had just reached twelve hundred and fifty when he suddenly realized that something was wrong. The light shining on the vertical surface immediately in front of his eyes was the wrong colour—and it was much too bright.

  Commander Norton did not even have time to check his ascent, or to call a warning to his men. Everything happened in less than a second.

  In a soundless concussion of light, dawn burst upon Rama.

  CHAPTER 18

  DAWN

  THE LIGHT WAS so brilliant that for a full minute Norton had to keep his eyes clenched tightly shut. Then he risked opening them, and stared through barely-parted lids at the wall a few centimetres in front of his face. He blinked several times, waited for the involuntary tears to drain away, and then turned slowly to behold the dawn.

  He could endure the sight for only a few seconds; then he was forced to close his eyes again. It was not the glare that was intolerable—he could grow accustomed to that—but the awesome spectacle of Rama, now seen for the first time in its entirety.

  Norton had known exactly what to expect; nevertheless the sight had stunned him. He was seized by a spasm of uncontrollable trembling; his hands tightened round the rungs of the ladder with the violence of a drowning man clutching at a lifebelt. The muscles of his forearms began to knot, yet at the same time his legs—already fatigued by hours of steady climbing—seemed about to give way. If it had not been for the low gravity, he might have fallen.

  Then his training took over, and he began to apply the first remedy for panic. Still keeping his eyes closed and trying to forget the monstrous spectacle around him, he started to take deep, long breaths, filling his lungs with oxygen and washing the poisons of fatigue out of his system.

  Presently he felt much better, but he did not open his eyes until he had performed one more action. It took a major effort of will to force his right hand to open—he had to talk to it like a disobedient child—but presently he manoeuvred it down to his waist, unclipped the safety belt from his harness, and hooked the buckle to the nearest rung. Now, whatever happened, he could not fall.

  Norton took several more deep breaths; then—still keeping his eyes closed—he switched on his radio. He hoped his voice sounded calm and authoritative as he called: 'Captain here. Is everyone OK?'

  As he checked off the names one by one, and received answers—even if somewhat tremulous ones—from everybody, his own confidence and self-control came swiftly back to him. All his men were safe, and were looking to him for leadership. He was the commander once more.

  'Keep your eyes closed until you're quite sure you can take it,' he called. 'The view is—overwhelming. If anyone finds that it's too much, keep on climbing without looking back. Remember, you'll soon be at zero gravity, so you can't possibly fall.'

  It was hardly necessary to point out such an elementary fact to trained spacemen, but Norton had to remind himself of it every few seconds. The thought of zero-gravity was a kind of talisman, protecting him from harm. Whatever his eyes told him, Rama could not drag him down to destruction on the plain eight kilometres below.

  It became an urgent matter of pride and self-esteem that he should open his eyes once more and look at the world around him. But first, he had to get his body under control.

  He let go of the ladder with both hands, and hooked his left arm under a rung. Clenching and unclenching his fists, he waited until the muscle cramps had faded away; then, when he felt quite comfortable, he opened his eyes and slowly turned to face Rama.

  His fist impression was one of blueness. The glare that filled the sky could not have been mistaken for sunlight; it might have been that of an electric arc. So Rama's sun, Norton told himself, must be hotter than ours. That should interest the astronomers…

  And now he understood the purpose of those mysterious trenches, the Straight Valley and its five companions; they were nothing less than gigantic strip-lights. Rama had six linear suns, symmetrically ranged around its interior. From each, a broad fan of light was aimed across the central axis, to shine upon the far side of the world. Norton wondered if they could be switched alternately to produce a cycle of light and darkness, or whether this was a planet of perpetual day.

  Too much staring at those blinding bars of light had made his eyes hurt again; he was not sorry to have a good excuse to close them for a while. It was not until then, when he had almost recovered from this initial visual shock, that he was able to devote himself to a much more serious problem.

  Who or what, had switched on the lights of Rama?

  This world was sterile, by the most sensitive tests that man could apply to it. But now something was happening that could not be explained by the action of natural forces. There might not be life here, but there could be consciousness, awareness; robots might be waking after a sleep of aeons. Perhaps this outburst of light was an unprogrammed, random spasm—a last dying gasp of machines that were responding wildly to the warmth of a new sun, and would soon lapse again into quiescence, this time for ever.

  Yet Norton could not believe such a simple explanation. Bits of the jigsaw puzzle were beginning to fall into place, though many were still missing. The absence of all signs of wear, for example—the feeling of newness, as if Rama had just been created…

  These thoughts might have inspired fear, even terror. Somehow, they did nothing of the sort. On the contrary, Norton felt a sense of exhilaration—almost of delight. There was far more here to discover than they had ever dared to hope. 'Wait,' he said to himself, 'until the Rama Committee hears about this!'

  Then, with a calm determination, he opened his eyes again and began a careful inventory of everything he saw.

  First, he had to establish some kind of reference system. He was looking at the largest enclosed space ever seen by man, and needed a mental map to find his way around it.

  The feeble gravity was very little help, for with an effort of will he could switch Up and Down. in any direction he pleased. But some directions were psychologically dangerous; whenever his mind skirted these, he had to vector it hastily away.

  Safest of all was to imagine that he was at the bowl-shaped bottom of a gigantic well, sixteen kilometres wide and fifty deep. The advantage of this image was that there could be no danger of falling further, nevertheless it had some serious defects.

  He could pretend that the scattered towns and cities, and the differently coloured and textured areas, were all securely fixed to the towering walls. The various complex structures that could be seen hanging from the dome overhead were perhaps no more disconcerting than the pendent candelabra in some great concert-ball on Earth. What was quite unacceptable was the Cylindrical Sea.

  There it was, halfway up the well-shaft—a band of water, wrapped completely round it, with no visible means of support. There could be no doubt that it was water; it was a vivid blue, flecked with brilliant sparkles from the few remaining ice floes. But a vertical sea forming a complete circle twenty kilometres up in the sky was such an unsettling phenomenon that after a while he began to seek an alternative.

  That was when his mind switched the scene through ninety degrees. Instantly, the deep well became a long tunnel, capped at either end. 'Down' was obviously in the direction of the ladder and the stairway he had just ascended; and now with this perspective, Norton was at last able to appreciate the true vision of the architects who had built this place.

  He was clinging to the face of a curving sixteen-kilometre-high cliff, the upper half of which overhung completely until it merged into the arched roof of what was now the sky. Beneath him, the ladder descended more than five hundred metres, until it ended at the first ledge or terrace. There the stairway began, continuing almost vertically at first in this low-gravity regime, then slowly becoming less and
less steep until, after breaking at five more platforms, it reached the distant plain. For the first two or three kilometres he could see the individual steps, but thereafter they had merged into a continuous band.

  The downward swoop of that immense stairway was so overwhelming that it was impossible to appreciate its true scale. Norton had once flown round Mount Everest, and had been awed by its size. He reminded himself that this stairway was as high as the Himalayas, but the comparison was meaningless.

  And no comparison at all was possible with the other two stairways, Beta and Gamma, which slanted up into the sky and then curved far out over his head. Norton had now acquired enough confidence to lean back and glance up at them—briefly. Then he tried to forget that they were there…

  For too much thinking along those lines evoked yet a third image of Rama, which he was anxious to avoid at all costs. This was the viewpoint that regarded it once again as a vertical cylinder or well—but now he was at the top, not the bottom, like a fly crawling upside down on a domed ceiling, with a fifty-kilometre drop immediately below. Every time Norton found this image creeping up on him, it needed all his willpower not to cling to the ladder again in mindless panic.

  In time, he was sure, all these fears would ebb. The wonder and strangeness of Rama would banish its terrors, at least for men who were trained to face the realities of space. Perhaps no one who had never left Earth, and had never seen the stars all around him, could endure these vistas. But if any men could accept them, Norton told himself with grim determination, it would be the captain and crew of Endeavour.

  He looked at his chronometer. This pause had lasted only two minutes, but it had seemed a lifetime. Exerting barely enough effort to overcome his inertia and the fading gravitational field, he started to pull himself slowly up the last hundred metres of the ladder. Just before he entered the airlock and turned his back upon Rama, he made one final swift survey of the interior.