And so, in the now deserted Control Center, David Bowman took his leave of the strangest sky that any man had ever seen. Half of it was filled with the steeply curving, ammonia-spattered landscape of Jupiter V; most of the rest was occupied by Jupiter itself. A huge, waning crescent, it was shrinking almost visibly as the ship rushed into its shadow; the distant Sun would soon be eclipsed behind it. And when, thought Bowman, shall I see the sun again?
The solar glare had already swallowed up the evening star called Earth. But though he could not see the world of men, its voice was still echoing through the ship, and on the Control Center monitor screen was a spectacle that would doubtless have baffled many quite intelligent extraterrestrial races.
One entity, holding a stubby rod in both hands, confronted another carrying a small spherical object. They both stood on a flat, triangular area of ground, while grouped around them in frozen, expectant postures, were some dozen other individuals. And at a greater distance, thousands more sat motionless on concentric tiers of seats.
The creature holding the sphere started to whirl its grasping limb around with ever-increasing violence. Suddenly, so swiftly that the eye could hardly follow its motion, the sphere escaped from its resting place and hurtled toward the entity with the rod. The creature was obviously in grave danger-but the projectile missed the intended target, and went racing past it.
There was a brief flurry of activity; then the sphere was returned to the original holder. The ordeal, it seemed, was to continue....
This time, however, the victim was able to defend himself more effectively. Puny though his protective shield was by luck or skill he managed to intercept the hurtling projectile-and even to send it soaring back over the head of his tormentor. Then, while his enemies were distracted, he started to spring for safety....
But Bowman never saw Malczinsky finish his home run. At that moment the alert and sleepless Athena, still watching over the ship, sounded the collision alarm.
The image from Earth was wiped off screen, as if it had never existed, to be replaced by the impersonal rings and spokes of the radar display. Bowman read their message in a second-and felt a sense of freezing loneliness that he had not known even when he had sent Kelvin Poole to follow Peter Whitehead to the stars.
Once more he was the only master of the ship, with none to help or advise him, in a moment of crisis. And this was a crisis indeed, for twenty miles ahead, directly in his line of flight, something was rising out of the Star Gate.
LAST MESSAGE
A moment later, Bowman switched to the high-definition display, and had a second surprise. The object was quite small-only about six feet long. Far too large to be a meteor, yet far too small to be a spaceship. He did not know whether to be disappointed, or relieved.
He locked the optical telescope onto the radar, and peered eagerly through the eyepiece. There it was, glinting in the sunlight-obviously metallic, obviously artificial. And then he cried out in astonishment; for the thing soaring out of the abyss was one of Discovery's own space probes, dropped into Jupiter V days or weeks ago.
He switched on the radio and searched the telemetry band. The signal came in at once, loud and clear. All these probes had short-lived power supplies, so that they should not clutter up the spectrum when they had done their -work-but this one was still radiating. A quick check of the frequency confirmed what he had already guessed.
This was the very last probe they had dropped into the Star Gate. It had vanished into that abyss, eleven thousand miles "down," while apparently moving faster than any manmade object in history. Yet now it had returned, still in perfect working order-only two days later.
It was moving quite slowly, rising up towards the face of Jupiter. And presently it vanished from sight against that looming disk; but he could still hear it, chirping briskly as it settled into an orbit that might or might not be stable -but which, he was quite certain, could only be the result of intelligent planning.
This could never have happened by chance, or by the operation of natural laws. The Star Gate had returned their gift; it must have done so deliberately.
Someone or something knew that they were here.
"This is David Bowman, recording for log. The ship is in perfect order and I am now scheduled to join Kaminski and Hunter and Kimball in hibernation.
"I am not going to do so. Instead, I am taking one of the pods, which is fully provisioned and fueled, and am descending into the Star Gate.
"I am completely aware of the risks, but I consider them acceptable. The safe return of our probe, after only two days, is proof that an object can pass unharmed through the Star Gate in a short period of time. I have enough oxygen for at least the one-way trip, and am prepared to take my chances at the other end.
"It seems to me that this is an invitation-even a sign of friendliness. I'm prepared to accept it as such. If I am wrong-well, I won't be the first explorer to make such a mistake.
"Bill, Vic, and Jack-if I don't see you again, good luck, and I hope you make it back to Earth. This is Dave, signing off."
THE WORLDS OF THE STAR GATE
A water who sets out to describe a civilization superior to his own is obviously attempting the impossible. A glance at the science fiction of fifty-or even twenty-years ago shows how futile it is to peer even a little way into the mists of time, and when dealing merely with the world of men.
Longer-range anticipations are clearly even less likely to be successful; imagine what sort of forecast one of the Pilgrim Fathers could have made of the United States in the year 1970! Practically nothing in his picture would have had any resemblance to the reality-which, in fact, would have been virtually incomprehensible to him.
But Stanley Kubrick and I were attempting, at the climax of our Odyssey, something even more outrageous. We had to describe and to show on the screen-the activities and environments, and perhaps the physical nature, of creatures millions of years ahead of man. This was, by definition, impossible. One might as well expect Moon-Watcher to give a lucid description of David Bowman and his society.
Obviously, the problem had to be approached indirectly. Even if we showed any extraterrestrial creatures and their habitats, they would have to be fairly near us on the evolutionary scale-say, not more than a couple of centuries ahead. They could hardly be the three-million-year old entities who were the powers behind the Black Monolith and the Star Gate.
But we certainly had to show something, though there were moments of despair when I feared we had painted ourselves into a corner from which there was no possible escape-except perhaps a "Lady or the Tiger" ending where we said goodbye to our hero just as he entered the Star Gate. That would have been the lazy way out, and would have started people queuing at the box office to get their money back. (As Jerry Agel has recorded, at least one person did just this-a Mrs. Patricia Attard of Denver, Colorado. If the manager of the handsome Cooper Cinerama did oblige, I shall be happy to reimburse him.)
Our ultimate solution now seems to me the only possible one, but before arriving at it we spent months imagining strange worlds and cities and creatures, in the hope of finding something that would produce the right shock of recognition. All this material was abandoned, but I would not say that any of it was unnecessary. It contained the alternatives that had to be eliminated, and therefore first had to be created.
Some of these Lost Worlds of the Star Gate are in the pages that follow. In working on them, I was greatly helped by two simple precepts. The first is due to Miss Mary Poppins: "I never explain anything."
The other is Clarke's Third* Law: "Any sufficiently advanced technology is indistinguishable from magic."
*Oh, very well. The First: "When a distinguished but elderly scientist says that something is possible, he is almost certainly right. When he says it is impossible, he is very probably wrong." (Profiles of the Future)
The Second: '`The only way of finding the limits of the possible is by going beyond them into the impossible."
 
; I decided that if three laws were good enough for Newton, they were good enough for me.
Stanley once claimed if anything could be written, he could film it. I am prepared to believe him-if he was given unlimited time and budget. However, as we were eventually a year and four million dollars over estimate, it was just as well that the problem of creating explicit super- civilizations was by-passed. There are things that are better left to the imagination-which is why so many 'horror' movies collapse when some pathetic papier-mache monster is finally revealed.
Stanley avoided this danger by creating the famous "psychedelic" sequence-or, as MGM eventually called it, "the ultimate trip." I am assured, by experts, that this is ' best appreciated under the influence of various chemicals, but do not intend to check this personally. It was certainly not conceived that way, at least as far as Stanley and I were concerned, though I would not presume to speak for all the members of the art and special-effects departments.
I raise this subject because some interested parties have tried to claim 2001 for their own. Once, at a science fiction convention, an unknown admirer thrust a packet into my hand; on opening it turned out to contain some powder and an anonymous note of thanks, assuring me that this was the "best stuff." (I promptly flushed it down the toilet.) Now, I do not know enough about drugs to have very strong views on the matter, and am only mildly in favour of the death penalty even for tobacco peddling, but it seems to me that "consciousness- expanding" chemicals do exactly the opposite. What they really expand are uncriticalness ("Crazy, man!") and general euphoria, which may be fine for personal relationships but is the death of real art .. . except possibly in restricted areas of music and poetry.
This recalls to mind Coleridge's "Kubla Khan," written under the influence of opium and interrupted by the persistent and thrice-accursed "Person from Porlock"-which incidentally, is a charming little village just four miles from my birthplace. At one time I started composing a parody of "Kubla Khan," which started promisingly enough:
For MGM did Kubrick, Stan A stately astrodome decree Where Art, the s.f. writer, ran Through plots incredible to man In search of solvency.... So twice five miles of Elstree ground With sets and props were girdled round . . .
Unfortunately, or perhaps not, inspiration evaporated at this point, and I was never able to work in:
A savage place! as eerie and enchanted As ere beneath a flickering arc was haunted By child-star wailing for her demon mother . . .
still less get as far as the projected ending:
For months meandering with a mazy motion Through stacks of scripts the desperate writer ran Then reached that plot incredible to man And sank, enSCUBA'd in the Indian Ocean. And midst the tumult Kubrick heard from far Accountants' voices, prophesying war!
The three "Worlds of the Star Gate" that follow are, to some extent, mutually incompatible with each other and with the final novel and movie versions. (There were still others-now forgotten or absorbed.) In the first, not only the surviving astronauts but Discovery itself encountered the immortal alien who had walked on earth, three million years ago.
The flying island that is the background of that meeting owes a little to Swift, more to Rene Magritte, and most of all to the Singhalese king Kassapa I (circa 473-491 A.D.) In the very heart of Ceylon, on an overhanging rock five hundred feet above the surrounding plain, Kassapa built a palace which is one of the archeological (and artistic) wonders of the world. When you walk among the windy ruins of Sigiriya, it is easy to believe that you are actually airborne, high above the miles of jungle spread out on every side. Sigiriya is, indeed, uncannily like a Ceylonese Xanadu-complete with pleasure gardens and dusky damsels.
REUNION
Of the Clindar who had walked on Earth, in another dawn, three million years ago, not a single atom now remained; yet though the body had been worn away and rebuilt times beyond number, it was no more than a temporary garment for the questing intelligence that it housed. It had been remodeled into many strange forms, for unusual missions, but always it had reverted to the basic humanoid design.
As for the memories and emotions of those three million years, spent on more than a thousand worlds, not even the most efficient storage system could hold them all in one brain. But they were available at a moment's notice, filed away in the immense memory vault that ringed the planet. Whenever he wished, Clindar could relive any portion of his past, in total recall. He could look again upon a flower or an insect that had fleetingly caught his eye ten thousand years before, hear the voice of creatures that had been extinct for ages, smell the winds of worlds that had long since perished in the funeral pyres of their own suns. Nothing was lost to him-if he. wished to recall it.
So when the signal had come in, and while the golden ship was being prepared for its journey, he had gone to the Palace of the Past and let his ancient memories flow back into his brain. Now it seemed that only yesterday- not three million years ago-he had hunted with the ape-men and shown Moon-Watcher how to find the stones that could be used as knives and clubs.
"They are awake," said a quiet voice in the depths of his brain. "They are moving around inside their ship."
That was good; at least they were alive. The robot's first report had indicated a ship of the dead, and it had been some time before the truth was realized. They were going to have a surprise, thought Clindar, when they woke so far from home, and he hoped they would appreciate it. There were few things that an immortal welcomed and valued more greatly than surprise; when there was none left in the universe, it would be time to die.
He walked slowly across the varying landscape of his little world, savoring this moment-for each of these encounters was unique, and each contributed something new to the pattern and the purpose of his life. Though he was alone upon this floating rock, unknown myriads of others were looking through his eyes and sharing his sensations, and myriads more would do so in the ages yet to come. Most of them would approximately share his shape, for this was a meeting that chiefly concerned those intelligences that could be called humanoid. But there would be not a few much stranger creatures watching, and many of them were his friends. To all these multiformed spectators he flashed a wry greeting-an infinitely complex and subtle variation on the universal jest that could be crudely expressed in the words, "I know all humanoids look the same-but I shall be the one on the right."
This sky-rock was not Clindar's only home, but it was the one he loved the best, for it was full of memories that needed no revival in the Palace of the Past. He had shared it thirty thousand years ago with a mating group long since dispersed through the Galaxy, and the radiance of those days still lingered, like the soft caress of the eternal dawn.
And because it was far from the shattering impact of the great centers of civilization, it was a perfect place to greet and reassure startled or nervous visitors. They were awed, but not overwhelmed; puzzled, but not alarmed. Seeing only Clindar, they were unaware of the forces and potentialities focused within him. they would know of these things when the time was ripe, or not at all.
The upper surface of the great rock was divided into three levels, with the villa at the highest end, and the flat apron of the landing stage at the lowest. Between them, and occupying more than half the total area, were the lawns and pools and courtyards and groves of trees among which Clindar had scattered the souvenirs of a thousand worlds and a hundred civilizations. The labor force to maintain all this skyborne beauty in immaculate condition was nowhere in sight; the simple animals and the more complex machines that supervised them had been ordered to remain in concealment until the meeting was over. The Eater of Grass and the Trimmer of Trees, utterly harmless though they were, could cause great terror to other beings who met them without adequate preparation. The only animals now visible on the surface of the rock were two brightly colored creatures, for all the world like flying carpets, that flapped around and around Clindar emitting a faint, musical hum. Presently he waved them away, and they undulated out of sight into the t
rees.
Clindar never hurried, except when it was absolutely essential, for haste was a sign of immaturity-and mortality. He paused for a long time beside the pool at the heart of his world, staring into the liquid mirror which reflected the sky above, and echoed the ocean far below. He was rather proud of that little lake, for it was the result of an experiment that had taken several thousand years to complete. Six varieties of fish from six different planets shared it, and looked at each other hungrily, but had learned from bitter experience that their biochemistries were highly incompatible.
He was still staring into the pool when he saw the reflection of the golden ship pass across it, as it settled down toward the landing stage at the far end of the rock. Raising his eyes, he watched while the ship came to rest in midair, dematerialized its center section, and extruded the cargo it had carried across the light-years.
The shining artifact of metal and plastic descending at the barely visible focus of the traction field seemed no cruder than most first-generation spacecraft. It touched the surface of the rock, the field supporting it flickered off, and the golden ship departed-to be ready again in a hundred years, or a thousand, as the case might be.