at... 'Atlanta, 2000 December 31.' 'This is CNN International, five minutes from the dawn of the New Millennium, with all its unknown perils and promise...' 'But before we try to explore the future, let's look back a thousand years, and ask ourselves: could any persons living in Ad. 1000 even remotely imagine our world, or understand it, if they were magically transported across the centuries?' 'Almost the whole of the technology we take for granted was invented near the very end of our Millennium -- the steam engine, electricity, telephones, radio, television, cinema, aviation, electronics. And, during a single lifetime, nuclear energy and space travel -- what would the greatest minds of the past have made of these? How long could an Archimedes or a Leonardo have retained his sanity, if suddenly dumped into our world?' 'It's tempting to think that we would do better, if we were transported a thousand years hence. Surely the fundamental scientific discoveries have already been made, though there will be major improvements in technology, will there be any devices, anything as magical and incomprehensible to us as a pocket calculator or a video camera would have been to Isaac Newton?' 'Perhaps our age is indeed sundered from all those that have gone before. Telecommunications, the ability to record images and sounds once irrevocably lost, the conquest of the air and space -- all these have created a civilization beyond the wildest fantasies of the past. And equally important, Copernicus, Newton, Darwin and Einstein have so changed our mode of thinking and our outlook on the universe that we might seem almost a new species to the most brilliant of our predecessors.' 'And will our successors, a thousand years from now, look back on us with the same pity with which we regard our ignorant, superstitious, disease-ridden, short-lived ancestors? We believe that we know the answers to questions that they could not even ask: but what surprises does the Third Millennium hold for us?' 'Well, here it comes --' A great bell began to toll the strokes of midnight. The last vibration throbbed into silence... 'And that's the way it was -- good-bye, wonderful and terrible twentieth century...' Then the picture broke into a myriad fragments, and a new commentator took over, speaking with the accent which Poole could now easily understand, and which immediately brought him up to the present. 'Now, in the first minutes of the year three thousand and one, we can answer that question from the past...' 'Certainly, the people of 2001 who you were just watching would not feel as utterly overwhelmed in our age as someone from 1001 would have felt in theirs. Many of our technological achievements they would have anticipated; indeed, they would have expected satellite cities, and colonies on the Moon and planets. They might even have been disappointed, because we are not yet immortal, and have sent probes only to the nearest stars...' Abruptly, Indra switched off the recording. 'See the rest later, Frank: you're getting tired. But I hope it will help you to adjust.' 'Thank you, Indra. I'll have to sleep on it. But it's certainly proved one point.' 'What's that?' 'I should be grateful I'm not a thousand-and-oner, dropped into 2001. That would be too much of a quantum jump: I don't believe anyone could adjust to it. At least I know about electricity, and won't die of fright if a picture starts talking at me.' I hope, Poole told himself, that confidence is justified. Someone once said that any sufficiently advanced technology is indistinguishable from magic. Will I meet magic in this new world -- and be able to handle it? 6 Braincap 'I'm afraid you'll have to make an agonizing decision,' said Professor Anderson, with a smile that neutralized the exaggerated gravity of his words. 'I can take it, Doctor. Just give it to me straight.' 'Before you can be fitted with your Braincap, you have to be completely bald. So here's your choice. At the rate your hair grows, you'd have to be shaved at least once a month. Or you could have a permanent.' 'How's that done?' 'Laser scalp treatment. Kills the follicles at the root.' 'Hmm... is it reversible?' 'Yes, but that's messy and painful, and takes weeks.' 'Then I'll see how I like being hairless, before committing myself. I can't forget what happened to Samson.' 'Who?' 'Character in a famous old book. His girl-friend cut off his hair while he was sleeping. When he woke up, all his strength had gone.' 'Now I remember -- pretty obvious medical symbolism!' 'Still, I wouldn't mind losing my beard. I'd be happy to stop shaving, once and for all.' 'I'll make the arrangements. And what kind of wig would you like?' Poole laughed. 'I'm not particularly vain -- think it would be a nuisance, and probably won't bother. Something else I can decide later.' That everyone in this era was artificially bald was a surprising fact that Poole had been quite slow to discover; his first revelation had come when both his nurses removed their luxuriant tresses, without the slightest sign of embarrassment, just before several equally bald specialists arrived to give him a series of micro-biological checks. He had never been surrounded by so many hairless people, and his initial guess was that this was the latest step in the medical profession's endless war against germs. Like many of his guesses, it was completely wrong, and when he discovered the true reason he amused himself by seeing how often he would have been sure, had he not known in advance, that his visitors' hair was not their own. The answer was: seldom with men, never with women; this was obviously the great age of the wig-maker. Professor Anderson wasted no time: that afternoon the nurses smeared some evil-smelling cream over Poole's head, and when he looked into the mirror an hour later he did not recognize himself. Well, he thought, perhaps a wig would be a good idea, after all... The Braincap fitting took somewhat longer. First a mould had to be made, which required him to sit motionless for a few minutes until the plaster set. He fully expected to be told that his head was the wrong shape when his nurses -- giggling most unprofessionally -- had a hard time extricating him. 'Ouch that hurt!' he complained. Next came the skull-cap itself, a metal helmet that fitted snugly almost down to the ears, and triggered a nostalgic thought -- wish my Jewish friends could see me now! After a few minutes, it was so comfortable that he was unaware of its presence. Now he was ready for the installation -- a process which, he realized with something akin to awe, had been the Rite of Passage for almost all the human race for more than half a millennium. 'There's no need to close your eyes,' said the technician, who had been introduced by the pretentious title of 'Brain Engineer' -- almost always shortened to 'Brainman' in popular usage. 'When Setup begins, all your inputs will be taken over. Even if your eyes are open, you won't see anything.' I wonder if everyone feels as nervous as this, Poole asked himself. Is this the last moment I'll be in control of my own mind? Still, I've learned to trust the technology of this age; up to now, it hasn't let me down. Of course, as the old saying goes, there's always a first time... As he had been promised, he had felt nothing except a gentle tickling as the myriad of nanowires wormed their way through his scalp. All his senses were still perfectly normal; when he scanned his familiar room, everything was exactly where it should be. The Brainman -- wearing his own skull-cap, wired, like Poole's, to a piece of equipment that could easily have been mistaken for a twentieth-century laptop computer -- gave him a reassuring smile. 'Ready?' he asked. There were times when the old cliche´s were the best ones. 'Ready as I'll ever be,' Poole answered. Slowly, the light faded -- or seemed to. A great silence descended, and even the gentle gravity of the Tower relinquished its hold upon him. He was an embryo, floating in a featureless void, though not in complete darkness. He had known such a barely visible, near ultra-violet tenebrosity, on the very edge of night, only once in his life when he had descended further than was altogether wise down the face of a sheer cliff at the outer edge of the Great Barrier Reef. Looking down into hundreds of metres of crystalline emptiness, he had felt such a sense of disorientation that he experienced a brief moment of panic, and had almost triggered his buoyancy unit before regaining control. Needless to say, he had never mentioned the incident to the Space Agency physicians... From a great distance a voice spoke out of the immense void that now seemed to surround him. But it did not reach him through his ears: it sounded softly in the echoing labyrinths of his brain. 'Calibration starting. From time to time you will be asked questions -- you can answer mentally, but it may help to vocalize. Do you understand?' 'Yes,' Poole replied, wondering if his lips were indeed moving. There was no way that he could tell. Something was appearing in the void -- a grid of thin lines, like a huge sheet of graph paper. It extended up and down, right and left, to the limits of his vision. He tried to move his head, but the image refused to change. Numbers started to flicker across the grid, too fast for him to read -- but presumably some circuit was recording them. Poole could not help smiling (did his cheeks move?) at the familiarity of it all. This was just like the computer-driven eye examination that any oculist of his age would give a client. The grid vanished, to be replaced by smooth sheets of colour filling his entire field of view. In a few seconds, they flashed from one end of the spectrum to the other. 'Could have told you that,' Poole muttered silently. 'My colour vision's perfect. Next for hearing, I suppose.' He was quite correct. A faint, drumming sound accelerated until it became the lowest of audible Cs, then raced up the musical scale until it disappeared beyond the range of human hearing, into bat and dolphin territory. That was the last of the simple, straightforward tests. He was briefly assailed by scents and flavours, most of them pleasant but some quite the reverse. Then he became, or so it seemed, a puppet on an invisible strig. He presumed that his neuromuscular control was being tested, and hoped that there were no external manifestations, if there were, he would probably look like someone in the terminal stages of St Vitus's Dance. And for one moment he even had a violent erection, but was unable to give it a reality check before he fell into a dreamless sleep. Or did he only dream that he slept? He had no idea how much time had elapsed before he awoke. The helmet had already gone, together with the Brainman and his equipment. 'Everything went fine,' beamed Matron. 'It will take a few hours to check that there are no anomalies. If your reading's KO -- I mean OK -- you'll have your Braincap tomorrow.' Poole appreciated the efforts of his entourage to learn archaic English, but he could not help wishing that Matron had not made that unfortunate slip-of-the-tongue. When the time came for the final filling, Poole felt almost like a boy again, about to unwrap some wonderful new toy under the Christmas free. 'You won't have to go through all that setting-up again,' the Brainman assured him. 'Download will start immediately. I'll give you a five-minute demo. Just relax and enjoy.' Gentle, soothing music washed over him; though it was something very familiar, from his own time, he could not identify it. There was a mist before his eyes, which parted as he walked towards it... Yes, he was walking! The illusion was utterly convincing; he could feel the impact of his feet on the ground, and now that the music had stopped he could hear a gentle wind blowing through the great trees that appeared to surround him. He recognized them as Californian redwoods, and hoped that they still existed in reality, somewhere on Earth. He was moving at a brisk pace -- too fast for comfort, as if time was slightly accelerated so he could cover as much ground as possible. Yet he was not conscious of any effort; he felt he was a guest in someone else's body. The sensation was enhanced by the fact that he had no control over his movements. When he attempted to stop, or to change direction, nothing happened. He was going along for the ride. It did not matter; he was enjoying the novel experience -- and could appreciate how addictive it could become. The 'dream machines' that many scientists of his own century had anticipated -- often with alarm -- were now part of everyday life. Poole wondered how Mankind had managed to survive: he had been told that much of it had not. Millions had been brain-burned, and had dropped out of life. Of course, he would be immune to such temptations! He would use this marvellous tool to learn more about the world of the Fourth Millennium, and to acquire in minutes new skills that would otherwise take years to master. Well -- he might, just occasionally, use the Braincap purely for fun... He had come to the edge of the forest, and was looking out across a wide river. Without hesitation, he walked into it, and felt no alarm as the water rose over his head. It did seem a little strange that he could continue breathing naturally, but he thought it much more remarkable that he could see perfectly in a medium where the unaided human eye could not focus. He could count every scale on the magnificent trout that went swimming past, apparently oblivious to this strange intruder... Then, a mermaid- Well he had always wanted to meet one, but he had assumed that they were marine creatures. Perhaps they occasionally came upstream -- like salmon, to have their babies? She was gone before he could question her, to confirm or deny this revolutionary theory. The river ended in a translucent wall; he stepped through it on to the face of a desert, beneath a blazing sun. Its heat burned him uncomfortably -- yet he was able to look directly into its noonday fury. He could even see, with unnatural clarity, an archipelago of sunspots near one limb. And -- this was surely impossible -- there was the tenuous glory of the corona, quite invisible except during total eclipse, reaching out like a swan's wings on either side of the Sun. Everything faded to black: the haunting music returned, and with it the blissful coolness of his familiar room. He opened his eyes (had they ever been closed?) and found an expectant audience waiting for his reaction. 'Wonderful!' he breathed, almost reverently. 'Some of it seemed -- well, realer than real!' Then his engineer's curiosity, never far from the surface, started nagging him. 'Even that short demo must have contained an enormous amount of information. How's it stored?' 'In these tablets -- the same your audio-visual system uses, but with much greater capacity.' The Brainman handed Poole a small square, apparently made of glass, silvered on one surface; it was almost the same size as the computer diskettes of his youth, but twice the thickness. As Poole tilted it back and forth, trying to see into its transparent interior, there were occasional rainbow-hued flashes, but that was all. He was holding, he realized, the end product of more than a thousand years of electro-optical technology -- as well as other technologies unborn in his era. And it was not surprising that, superficially, it resembled closely the devices he had known. There was a convenient shape and size for most of the common objects of everyday life --knives and forks, books, hand-tools, furniture... and removable memories for computers. 'What's its capacity?' he asked. 'In my time, we were up to a terabyte in something this size. I'm sure you've done a lot better.' 'Not as much as you might imagine -- there's a limit, of course, set by the structure of matter. By the way, what was a terabyte? Afraid I've forgotten.' 'Shame on you! Kilo, mega, giga, tera... that's ten to the twelfth bytes. Then the petabyte -- ten to the fifteenth -- that's as far as I ever got.' 'That's about where we start. It's enough to record everything any person can experience during one lifetime.' It was an astonishing thought, yet it should not have been so surprising. The kilogram of jelly inside the human skull was not much larger than the tablet Poole was holding in his hand, and it could not possibly be as efficient a storage device -- it had so many other duties to deal with. 'And that's not all,' the Brainman continued. 'With some data compression, it could store not only the memories -- but the actual person.' 'And reproduce them again?' 'Of course; straightforward job of nanoassembly.' So I'd heard, Poole told himself -- but I never really believed it. Back in his century, it seemed wonderful enough that the entire lifework of a great artist could be stored on a single small disk. And now, something no larger could hold -- the artist as well. 7 Debriefing 'I'm delighted,' said Poole, 'to know that the Smithsonian still exists, after all these centuries.' 'You probably wouldn't recognize it,' said the visitor who had introduced himself as Dr Alistair Kim, Director of Astronautics. 'Especially as it's now scattered over the Solar System -- the main off-Earth collections are on Mars and the Moon, and many of the exhibits that legally belong to us are still heading for the stars. Some day we'll catch up with them and bring them home. We're particularly anxious to get our hands on Pioneer 10 -- the first manmade object to escape from the Solar System.' 'I believe I was on the verge of doing that, when they located me.' 'Lucky for you -- and for us. You may be able to throw light on many things we don't know.' 'Frankly, I doubt it -- but I'll do my best. I don't remember a thing after that runaway space-pod charged me. Though I still find it hard to believe, I've been told that Hal was responsible.' 'That's true, but it's a complicated story. Everything we've been able to learn is in this recording -- about twenty hours, but you can probably Fast most of it.' 'You know, of course, that Dave Bowman went out in the Number 2 Pod to rescue you -- but was then locked outside the ship because Hal refused to open the pod-bay doors.' 'Why, for God's sake?' Dr Kim winced slightly. It was not the first time Poole had noticed such a reaction. (Must watch my language, he thought. 'God' seems to be a dirty word in this culture -- must ask Indra about it.) 'There was a major programming error in Hal's instructions -- he'd been given control of aspects of the mission you and Bowman didn't know about, it's all in the recording... 'Anyway, he also cut off the life-support systems to the three hybernauts -- the Alpha Crew -- and Bowman had to jettison their bodies as well.' (So Dave and I were the Beta Crew -- something else I didn't know...) 'What happened to them?' Poole asked. 'Couldn't they have been rescued, just as I was?' 'I'm afraid not: we've looked into it, of course. Bowman ejected them several hours after he'd taken back control from Hal, so their orbits were slightly different from yours. Just enough for them to burn up in Jupiter -- while you skimmed by, and got a gravity boost that would have taken you to the Orion Nebula in a few thousand more years...' 'Doing everything on manual override -- really a fantastic performance! -- Bowman managed to get Discovery into orbit round Jupiter. And there he encountered what the Second Expedition called Big Brother -- an apparent twin of the Tycho Monolith, but hundreds of times larger.' 'And that's where we lost him. He left Discovery in the remaining space-pod, and made a rendezvous with Big Brother. For almost a thousand years, we've been haunted by his last message: "By Deus -- it's full of stars!" (Here we go again! Poole told himself. No way Dave could have said that... Must have been 'My God -- it's full of stars!') 'Apparently the pod was drawn into the Monolith by some kind of inertial field, because it -- and presumably Bowman -- survived an acceleration which should have crushed them instantly. And that was the last information anyone had, for almost ten years, until the joint US-Russian Leonov mission...' 'Which made a rendezvous with the abandoned Discovery so that Dr Chandra could go aboard and reactivate Hal. Yes, I know that.' Dr Kim looked slightly embarrassed. 'Sorry -- I wasn't sure how much you'd been told already Anyway, that's when even stranger things started to happen.' 'Apparently the arrival of Leonov triggered something inside Big Brother. If we did not have these recordings, no one would have believed what happened. Let me show you... here's Dr Heywood Floyd keeping the midnight watch aboard Discovery, after power had been restored. Of course you'll recognize everything.' (Indeed I do: and how strange to see the long-dead Heywood Floyd, sitting in my old seat with Hal's unblinking red eye surveying everything in sight. And even stranger to think that Hal and I have both shared the same experience of resurrection from the dead...) A message was coining up on one of the monitors, and Floyd answered lazily, 'OK, Hal. Who is calling?' NO IDENTIFICATION. Floyd looked slightly annoyed. 'Very well. Please give me the message.' IT IS DANGEROUS TO REMAIN HERE. YOU MUST LEAVE WITHIN FIFTEEN DAYS. 'That is absolutely impossible. Our launch window does not open until twenty-six days from now. We do not have sufficient propellant for an earlier departure.' I AM AWARE OF THESE FACTS. NEVERTHELESS YOU MUST LEAVE WITHIN FWFEEN DAYS. 'I cannot take this warning seriously unless I know its origin... who is speaking to me?' I WAS DAVID BOWMAN. IT IS IMPORTANT THAT YOU BELIEVE ME. LOOK BEHIND YOU. Heywood Floyd slowly turned in his swivel chair, away from the banked panels and switches of the computer display, towards the Velcro-covered catwalk behind. ('Watch this carefully,' said Dr Kim. As if I needed telling, thought Poole...) The zero-gravity environment of Discovery's observation deck was much dustier than he remembered it: he guessed that the air-filtration plant had not yet been brought on line. The parallel rays of the distant yet still brilliant Sun, streaming through the great windows, lit up a myriad of dancing motes in a classic display of Brownian movement. And now something strange was happening to these particles of dust; some force seemed to be marshalling them, herding them away from a central point yet bringing others towards it, until they all met on the surface of a hollow sphere. That sphere, about a metre across, hovered in the air for a moment like a giant soap bubble. Then it elongated into an ellipsoid, whose surface began to pucker, to form folds and indentations. Poole was not really surprised when it started to assume the shape of a man. He had seen such figures, blown out of glass, in museums and science exibitions. But this dusty phantom did not even approximate anatomical accuracy; it was like a crude clay figurine, or one of the primitive works of art found in the recesses of Stone Age caves. Only the head was fashioned with care; and the face, beyond all shadow of doubt, was that of Commander David Bowman. HELLO, DR FLOYD. NOW DO YOU BELIEVE ME? The lips of the figure never moved: Poole realized that the voice -- yes, certainly Bowman's voice -- was actually coming from the speaker grille. THIS IS VERY DIFFICULT FOR ME, AND I HAVE LIITLE TIME. I HAVE BEEN ALLOWED TO GIVE THIS WARNING. YOU HAVE ONLY FIFFEEN DAYS. 'Why -- and what are you?' But the ghostly figure was already fading, its grainy envelope beginning to dissolve back into the constituent particles of dust. GOOD-BYE, DOCTOR FLOYD. WE CAN HAVE NO FURTHER CONTACT. BUT THERE MAY BE ONE MORE MESSAGE, IF ALL GOES WELL. As the image dissolved, Poole could not help smiling at that old Space Age cliche´. 'If all goes well' -- how many times he had heard that phrase intoned before a mission! The phantom vanished: only the motes of dancing dust were left, resuming their random patterns in the air. With an effort of will, Poole came back to the present. 'Well, Commander -- what do you think of that?' asked Kim. Poole was still shaken, and it was several seconds before he could reply. 'The face and the voice were Bowman's -- I'd swear to that. But what was it?' 'That's what we're still arguing about. Call it a hologram, a projection -- of course, there are plenty of ways it could be faked if anyone wanted to -- but not in those circumstances! And then, of course, there's what happened next.' 'Lucifer?' 'Yes. Thanks to that warning, the Leonov had just sufficient time to get away before Jupiter detonated.' 'So whatever it was, the Bowman-thing was friendly and trying to help.' 'Presumably. And it may have been responsible for that "one more message" we did receive -- it was sent only minutes before the detonation. Another waning.' Dr Kim brought the screen to life once more. It showed plain text: ALL THESE WORLDS ARE YOURS EXCEPT EUROPA. ATTEMPT NO LANDINGS THERE. The same message was repeated about a hundred times, then the letters became garbled. 'And we never have tried to land there?' asked Poole. 'Only once, by accident, thirty-six years later -- when the USSS Galaxy was hijacked and forced down there, and her sister ship Universe had to go to the rescue. It's all here --with what little our robot monitors have told us about the Europans.' 'I'm anxious to see them.' 'They're amphibious, and come in all shapes and sizes. As soon as Lucifer started melting the ice that covered theirt whole world, they began to emerge from the sea. Since then, they've developed at a speed that seems biologically impossible.' 'From what I remember about Europa, weren't there lots of cracks in the ice? Perhaps they'd already started crawling through and having a look round.' 'That's a widely accepted theory. But there's another, much more speculative, one. The Monolith may have been involved, in ways we don't yet understand. What triggered that line of thought was the discovery of TMA ZERO, right here on Earth, almost five hundred years after your time. I suppose you've been told about that?' 'Only vaguely -- there's been so much to catch up with! I did think the name was ridiculous -- since it wasn't a magnetic anomaly -- and it was in Africa, not Tycho!' 'You're quite right, of course, but we're stuck with the name. And the more we learn about the Monoliths, the more the puzzle deepens. Especially as they're still the only real evidence for advanced technology beyond the Earth.' 'That's surprised me. I should have thought that by this lime we'd have picked up radio signals from somewhere. The astronomers started searching when I was a boy!' 'Well, there is one hint -- and it's so terrifying that we don't like to talk about it. Have you heard of Nova Scorpio?' 'I don't believe so.' 'Stars go nova all the time, of course -- and this wasn't a particularly impressive one. But before it blew up, N Scorp was known to have several planets.' 'Inhabited?' 'Absolutely no way of telling; radio searches had picked up nothing. And here's the nightmare...' 'Luckily, the automatic Nova Patrol caught the event at the very beginning. And it didn't start at the star. One of the planets detonated first, and then triggered its sun.' 'My Gah... sorry, go on.' 'You see the point. It's impossible for a planet to go nova -- except in one way.' 'I once read a sick joke in a science-fiction novel -- "supernovae are industrial accidents".' 'It wasn't a supernova -- but that may be no joke. The most widely accepted theory is that someone else had been tapping vacuum energy -- and had lost control.' 'Or it could have been a war.' 'Just as bad; we'll probably never know. But as our own civilization depends on the same energy source, you can understand why N Scorp sometimes gives us nightmares.' 'And we only had melting nuclear reactors to worry about!' 'Not any longer, thank Deus. But I really wanted to tell you more about TMA ZERO's discovery, because it marked a turning point in human history.' 'Finding TMA ONE on the Moon was a big enough shock, but five hundred years later there was a worse one. And it was much nearer home -- in every sense of the word. Down there in Africa.' 8 Return to Olduvai The Leakeys, Dr Stephen Del Marco often told himself, would never have recognized this place, even though it's barely a dozen kilometres from where Louis and Mary, five centuries ago, dug up the bones of our first ancestors. Global warming, and the Little Ice Age (truncated by miracles of heroic technology) had transformed the landscape, and completely altered its biota. Oaks and pine trees were still fighting it out, to see which would survive the changes in climatic fortune. And it was hard to believe that, by this year 2513, there was anything left in Olduvai undug by enthusiastic anthropologists. However, recent flash-floods -- which were not supposed to happen any more -- had resculpted this area, and cut away several metres of topsoil. Del Marco had taken advantage of the opportunity: and there, at the limit of the deep-scan, was something he could not quite believe. It had taken more than a year of slow and careful excavation to reach that ghostly image, and to learn that the reality was stranger than anything he had dared to imagine. Robot digging machines had swiftly removed the first few metres, then the traditional slave-crews of graduate students had taken over. They had been helped -- or hindered -- by a team of four kongs, who Del Marco considered more trouble than they were worth. However, the students adored the genetically-enhanced gorillas, whom they treated like retarded but much-loved children. It was rumoured that the relationships were not always completely Platonic. For the last few metres, however, everything was the work of human hands, usually wielding toothbrushes -- soft-bristled at that. And now it was finished: Howard Carter, seeing the first glint of gold in Tutankhamen's tomb, had never uncovered such a treasure as this. From this moment onwards, Del Marco knew, human beliefs and philosophies would be irrevocably changed. The Monolith appeared to be the exact twin of that discovered on the Moon five centuries earlier: even the excavation surrounding it was almost identical in size. And like TMA ONE, it was totally non-reflective, absorbing with equal indifference the fierce glare of the African Sun and the pale gleam of Lucifer. As he led his colleagues -- the directors of the world's half-dozen most famous museums, three eminent anthropologists, the heads of two media empires -- down into the pit, Del Marco wondered if such a distinguished group of men and women had ever been so silent, for so long. But that was the effect that this ebon rectangle had on all visitors, as they realized the implications of the thousands of artefacts that surrounded it. For here was an archaeologist's treasure-trove -- crudely-fashioned flint tools, countless bones -- some animal, some human -- and almost all arranged in careful patterns. For centuries -- no, millennia -- these pitiful gifts had been brought here, by creatures with only the first glimmer of intelligence, as tribute to a marvel beyond their understanding. And beyond ours, Del Marco had often thought. Yet of two things he was certain, though he doubted if proof would ever be possible. This was where -- in time and space -- the human species had really begun. And this Monolith was the very first of all its multitudinous gods. 9 Skyland 'There were mice in my bedroom last night,' Poole complained, only half seriously. 'Is there any chance you could find me a cat?' Dr Wallace looked puzzled, then started to laugh. 'You must have heard one of the cleaning microts -- I'll get the programming checked so they don't disturb you. Try not to step on one if you catch it at work; if you do, it will call for help, and all its friends will come to pick up the pieces.' So much to learn -- so little time! No, that wasn't true, Poole reminded himself. He might well have a century ahead of him, thanks to the medical science of this age. The thought was already beginning to fill him with apprehension rather than pleasure. At least he was now able to follow most conversations easily, and had learned to pronounce words so that Indra was not the only person who could understand him. He was very glad that Anglish was now the world language, though French, Russian and Mandarin still flourished. 'I've another problem, Indra -- and I guess you're the only person who can help. When I say "God", why do people look embarrassed?' Indra did not look at all embarrassed; in fact, she laughed. 'That's a very complicated story. I wish my old friend Dr Khan was here to explain it to you -- but he's on Ganymede, curing any remaining True Believers he can find there. When all the old religions were discredited -- let me tell you about Pope Pius XX sometime -- one of the greatest men in history! -- we still needed a word for the Prime Cause, or the Creator of the Universe -- if there is one...' 'There were lots of suggestions -- Deo -- Theo -- Jove -- Brahma -- they were all tried, and some of them are still around -- especially Einstein's favourite, "The Old One". But Deus seems to be the fashion nowadays.' 'I'll try to remember; but it still seems silly to me.' 'You'll get used to it: I'll teach you some other reasonably polite expletives, to use when you want to express your feelings...' 'You said that all the old religions have been discredited. So what do people believe nowadays?' 'As little as possible. We're all either Deists or Theists.' 'You've lost me. Definitions, please.' 'They were slightly different in your time, but here are the latest versions. Theists believe there's not more than one God; Deists that there is not less than one God.' 'I'm afraid the distinction's too subtle for me.' 'Not for everyone; you'd be amazed at the bitter controversies it's aroused. Five centuries ago, someone used what's known as surreal mathematics to prove there's an infinite number of grades between Theists and Deists. Of course, like most dabblers with infinity, he went insane. By the way, the best-known Deists were Americans -- Washington, Franklin, Jefferson.' 'A little before my time -- though you'd be surprised how many people don't realize it.' 'Now I've some good news. Joe -- Prof. Anderson -- has finally given his -- what was the phrase? -- OK. You're fit enough to go for a little trip upstairs... to the Lunar Level.' 'Wonderful. How far is that?' 'Oh, about twelve thousand kilometres.' 'Twelve thousand! That will take hours!' Indra looked surprised at his remark: then she smiled. 'Not as long as you think. No -- we don't have a Star Trek Transporter yet -- though I believe they're still working on it! But you'll need new clothes, and someone to show you how to wear them. And to help you with the hundreds of little everyday jobs that can waste so much time. So we've taken the liberty of arranging a human personal assistant for you Come in, Danil.' Danil was a small, light-brown man in his mid-thirties, who surprised Poole by not giving him the usual palm-top salute, with its automatic exchange of information. Indeed, it soon appeared that Danil did not possess an Ident: whenever it was needed, he produced a small rectangle of plastic that apparently served the same purpose as the twenty-first century's 'smart cards'. 'Danil will also be your guide and what was that word? -- I can never remember -- rhymes with "ballet". He's been specially trained for the job. I'm sure you'll find him completely satisfactory.' Though Poole appreciated this gesture, it made him feel a little uncomfortable. A valet, indeed! He could not recall ever meeting one; in his time, they were already a rare and endangered species. He began to feel like a character from an early-twentieth-century English novel. 'You have a choice,' said Indra, 'though I know which one you'll take. We can go up on an external elevator, and admire the view -- or an interior one, and enjoy a meal and some light entertainment.' 'I can't imagine anyone wanting to stay inside.' 'You'd be surprised. It's too vertiginous for some people -- especially visitors from down below. Even mountain climbers who say they've got a head for heights may start to turn green -- when the heights are measured in thousands of kilometres, instead of metres.' 'I'll risk it,' Poole answered with a smile. 'I've been higher.' When they had passed through a double set of airlocks in the exterior wall of the Tower (was it imagination, or did he feel a curious sense of disorientation then?) they entered what might have been the auditorium of a very small theatre. Rows of ten seats were banked up in five tiers: they all faced towards one of the huge picture windows which Poole still found disconcerting, as he could never quite forget the hundreds of tons of air pressure, striving to blast it out into space. The dozen or so other passengers, who had probably never given the matter any thought, seemed perfectly at ease. They all smiled as they recognized him, nodded politely, then turned away to admire the view. 'Welcome to Skylounge,' said the inevitable autovoice. 'Ascent begins in five minutes. You will find refreshments and toilets on the lower floor.' Just how long will this trip last? Poole wondered. We're going to travel over twenty thousand klicks, there and back: this will be like no elevator ride I've ever known on Earth... While he was waiting for the ascent to begin, he enjoyed the stunning panorama laid out two thousand kilometres below. It was winter in the northern hemisphere, but the climate had indeed changed drastically, for there was little snow south of the Arctic Circle. Europe was almost cloud-free, and there was so much detail that the eye was overwhelmed. One by one he identified the great cities whose names had echoed down the centuries; they had been shrinking even in his time, as the communications revolution changed the face of the world, and had now dwindled still further. There were also some bodies of water in improbable places -- the northern Sahara's Lake Saladin was almost a small sea. Poole was so engrossed by the view that he had forgotten the passage of time. Suddenly he realized that much more than five minutes had passed -- yet th