The Collected Stories of Robert Silverberg, Volume Seven: We Are for the Dark

by Robert Silverberg

  But the stuff that was turning up in the chemistry labs to replace the tungsten-186 and the osmium-186 had an atomic number of 94, no question about that. And element 94 was plutonium. That couldn’t be disputed either. The defining characteristic of plutonium was the presence of 94 protons in its nucleus. If that was the count, plutonium was what that element had to be.

  This impossibly light isotope of plutonium, this plutonium-186, had another impossible characteristic about it: not only was it stable, it was so completely stable that it wasn’t even radioactive. It just sat there, looking exceedingly unmysterious, not even deigning to emit a smidgen of energy. At least, not when first tested. But a second test revealed positron emission, which a third baffled look confirmed. The trouble was that the third measurement showed an even higher level of radioactivity than the second one. The fourth was higher than the third. And so on and so on.

  Nobody had ever heard of any element, of whatever atomic number or weight, that started off stable and then began to demonstrate a steadily increasing intensity of radioactivity. No one knew what was likely to happen, either, if the process continued unchecked, but the possibilities seemed pretty explosive. The best suggestion anyone had was to turn it to powder and mix it with nonradioactive tungsten. That worked for a little while, until the tungsten turned radioactive too. After that graphite was used, with somewhat better results, to damp down the strange element’s output of energy. There were no explosions. But more and more plutonium-186 kept arriving.

  The only explanation that made any sense—and it did not make very much sense—was that it was coming from some unknown and perhaps even unknowable place, some sort of parallel universe, where the laws of nature were different and the binding forces of the atom were so much more powerful that plutonium-186 could be a stable isotope.

  Why they were sending odd lumps of plutonium-186 here was something that no one could begin to guess. An even more important question was how they could be made to stop doing it. The radioactive breakdown of the plutonium-186 would eventually transform it into ordinary osmium or tungsten, but the twenty positrons that each plutonium nucleus emitted in the course of that process encountered and annihilated an equal number of electrons. Our universe could afford to lose twenty electrons here and there, no doubt. It could probably afford to go on losing electrons at a constant rate for an astonishingly long time without noticing much difference. But sooner or later the shift toward an overall positive charge that this electron loss created would create grave and perhaps incalculable problems of symmetry and energy conservation. Would the equilibrium of the universe break down? Would nuclear interactions begin to intensify? Would the stars—even the Sun—erupt into supernovas?

  “This can’t go on,” Fletcher said gloomily.

  Hammond gave him a sour look. “So? We’ve been saying that for six months now.”

  “It’s time to do something. They keep shipping us more and more and more, and we don’t have any idea how to go about telling them to cut it out.”

  “We don’t even have any idea whether they really exist,” Raymond Nikolaus put in.

  “Right now that doesn’t matter. What matters is that the stuff is arriving constantly, and the more of it we have, the more dangerous it is. We don’t have the foggiest idea of how to shut off the shipments. So we’ve got to find some way to get rid of it as it comes in.”

  “And what do you have in mind, pray tell?” Hammond asked.

  Fletcher said, glaring at his colleague in a way that conveyed the fact that he would brook no opposition, “I’m going to talk to Asenion.”

  Hammond guffawed. “Asenion? You’re crazy!”

  “No. He is. But he’s the only person who can help us.”

  It was a sad case, the Asenion story, poignant and almost incomprehensible. One of the finest minds atomic physics had ever known, a man to rank with Rutherford, Bohr, Heisenberg, Fermi, Meitner. A Harvard degree at twelve, his doctorate from MIT five years later, after which he had poured forth a dazzling flow of technical papers that probed the deepest mysteries of the nuclear binding forces. As the twenty-first century entered its closing decades he had seemed poised to solve once and for all the eternal riddles of the universe. And then, at the age of twenty-eight, without having given the slightest warning, he walked away from the whole thing.

  “I have lost interest,” he declared. “Physics is no longer of any importance to me. Why should I concern myself with these issues of the way in which matter is constructed? How tiresome it all is! When one looks at the Parthenon, does one care what the columns are made of, or what sort of scaffolding was needed to put them in place? That the Parthenon exists, and is sublimely beautiful, is all that should interest us. So too with the universe. I see the universe, and it is beautiful and perfect. Why should I pry into the nature of its scaffolding? Why should anyone?”

  And with that he resigned his professorship, burned his papers, and retreated to the 33rd floor of an apartment building on Manhattan’s West Side, where he built an elaborate laboratory-greenhouse in which he intended to conduct experiments in advanced horticulture.

  “Bromeliads,” said Asenion. “I will create hybrid bromeliads. Bromeliads will be the essence and center of my life from now on.”

  Romelmeyer, who had been Asenion’s mentor at Harvard, attributed his apparent breakdown to overwork, and thought that he would snap back in six or eight months. Jantzen, who had had the rare privilege of being the first to read his astonishing dissertation at MIT, took an equally sympathetic position, arguing that Asenion must have come to some terrifying impasse in his work that had compelled him to retreat dramatically from the brink of madness. “Perhaps he found himself looking right into an abyss of inconsistencies when he thought he was about to find the ultimate answers,” Jantzen suggested. “What else could he do but run? But he won’t run for long. It isn’t in his nature.”

  Burkhardt, of Cal Tech, whose own work had been carried out in the sphere that Asenion was later to make his own, agreed with Jantzen’s analysis. “He must have hit something really dark and hairy. But he’ll wake up one morning with the solution in his head, and it’ll be goodbye horticulture for him. He’ll turn out a paper by noon that will revolutionize everything we think we know about nuclear physics, and that’ll be that.”

  But Jesse Hammond, who had played tennis with Asenion every morning for the last two years of his career as a physicist, took a less charitable position. “He’s gone nuts,” Hammond said. “He’s flipped out altogether, and he’s never going to get himself together again.”

  “You think?” said Lew Fletcher, who had been almost as close to Asenion as Hammond, but who was no tennis player.

  Hammond smiled. “No doubt of it. I began noticing a weird look in his eyes starting just about two years back. And then his playing started to turn weird too. He’d serve and not even look where he was serving. He’d double-fault without even caring. And you know what else? He didn’t challenge me on a single out-of-bounds call the whole year. That was the key thing. Used to be, he’d fight me every call. Now he just didn’t seem to care. He just let everything go by. He was completely indifferent. I said to myself, This guy must be flipping out.”

  “Or working on some problem that seems more important to him than tennis.”

  “Same thing,” said Hammond. “No, Lew, I tell you—he’s gone completely unglued. And nothing’s going to glue him again.”

  That conversation had taken place almost a year ago. Nothing had happened in the interim to change anyone’s opinion. The astounding arrival of plutonium-186 in the world had not brought forth any comment from Asenion’s Manhattan penthouse. The sudden solemn discussions of fantastic things like parallel universes by otherwise reputable physicists had apparently not aroused him either. He remained closeted with his bromeliads, high above the streets of Manhattan.

  Well, maybe he is crazy, Fletcher thought. But his mind can’t have shorted out entirely. And he might just have an ide
a or two left in him—

  Asenion said, “Well, you don’t look a whole lot older, do you?”

  Fletcher felt himself reddening. “Jesus, Ike, it’s only been eighteen months since we last saw each other!”

  “Is that all?” Asenion said indifferently. “It feels like a lot more to me.”

  He managed a thin, remote smile. He didn’t look very interested in Fletcher or in whatever it was that had brought Fletcher to his secluded eyrie.

  Asenion had always been an odd one, of course—aloof, mysterious, with a faint but unmistakable air of superiority about him that nearly everyone found instantly irritating. Of course, he was superior. But he had made sure that he let you know it, and never seemed to care that others found the trait less than endearing.

  He appeared more remote than ever, now, stranger and more alien. Outwardly he had not changed at all: the same slender, debonair figure, surprisingly handsome, even striking. Though rumor had it that he had not left his penthouse in more than a year, there was no trace of indoor pallor about him. His skin still had its rich deep olive coloring, almost swarthy, a Mediterranean tone. His hair, thick and dark, tumbled down rakishly over his broad forehead. But there was something different about his dark, gleaming eyes. The old Asenion, however preoccupied he might have been with some abstruse problem of advanced physics, had nearly always had a playful sparkle in his eyes, a kind of amiable devilish glint. This man, this horticultural recluse, wore a different expression altogether—ascetic, mist-shrouded, absent. His gaze was as bright as ever, but the brightness was a cold one that seemed to come from some far-off star.

  Fletcher said, “The reason I’ve come here—”

  “We can go into all that later, can’t we, Lew? First come into the greenhouse with me. There’s something I want to show you. Nobody else has seen it yet, in fact.”

  “Well, if you—”

  “Insist, yes. Come. I promise you, it’s extraordinary.”

  He turned and led the way through the intricate pathways of the apartment. The sprawling many-roomed penthouse was furnished in the most offhand way, cheap student furniture badly cared for. Cats wandered everywhere, five, six, eight of them, sharpening their claws on the upholstery, prowling in empty closets whose doors stood ajar, peering down from the tops of bookcases containing jumbled heaps of coverless volumes. There was a rank smell of cat urine in the air.

  But then suddenly Asenion turned a corridor and Fletcher, following just behind, found himself staring into what could have been an altogether different world. They had reached the entrance to the spectacular glass-walled extension that had been wrapped like an observation deck around the entire summit of the building. Beyond, dimly visible inside, Fletcher could see hundreds or perhaps thousands of strange-looking plants, some hanging from the ceiling, some mounted along the sides of wooden pillars, some rising in stepped array on benches, some growing out of beds set in the floor.

  Asenion briskly tapped out the security-combination code on a diamond-shaped keyboard mounted in the wall, and the glass door slid silently back. A blast of warm humid air came forth.

  “Quickly!” he said. “Inside!”

  It was like stepping straight into the Amazon jungle. In place of the harsh, dry atmosphere of a Manhattan apartment in midwinter there was, abruptly, the dense moist sweet closeness of the tropics, enfolding them like folds of wet fabric. Fletcher almost expected to hear parrots screeching overhead.

  And the plants! The bizarre plants, clinging to every surface, filling every available square inch!

  Most of them followed the same general pattern, rosettes of broad shining strap-shaped leaves radiating outward from a central cup-shaped structure deep enough to hold several ounces of water. But beyond that basic area of similarity they differed wildly from one another. Some were tiny, some were colossal. Some were marked with blazing stripes of yellow and red and purple that ran the length of their thick, succulent leaves. Some were mottled with fierce blotches of shimmering, assertive, bewilderingly complicated combinations of color. Some, whose leaves were green, were a fiery scarlet or crimson, or a somber, mysterious blue, at the place where the leaves came together to form the cup. Some were armed with formidable teeth and looked ready to feed on unwary visitors. Some were topped with gaudy spikes of strangely shaped brilliant-hued flowers taller than a man, which sprang like radiant spears from their centers.

  Everything glistened. Everything seemed poised for violent, explosive growth. The scene was alien and terrifying. It was like looking into a vast congregation of hungry monsters. Fletcher had to remind himself that these were merely plants, hothouse specimens that probably wouldn’t last half an hour in the urban environment outside.

  “These are bromeliads,” Asenion said, shaping the word sensuously in his throat as though it were the finest word any language had ever produced. “Tropical plants, mainly. South and Central America is where most of them live. They tend to cling to trees, growing high up in the forks of branches, mainly. Some live at ground level, though. Such as the bromeliad you know best, which is the pineapple. But there are hundreds of others in this room. Thousands. And this is the humid room, where I keep the guzmanias and the vrieseas and some of the aechmeas. As we go around, I’ll show you the tillandsias—they like it a lot drier—and the terrestrial ones, the hechtias and the dyckias, and then over on the far side—”

  “Ike,” Fletcher said quietly.

  “You know I’ve never liked that name.”

  “I’m sorry. I forgot.” That was a lie. Asenion’s given name was Ichabod. Neither Fletcher nor anyone Fletcher knew had ever been able to bring himself to call him that. “Look, I think what you’ve got here is wonderful. Absolutely wonderful. But I don’t want to intrude on your time, and there’s a very serious problem I need to discuss with—”

  “First the plants,” Asenion said. “Indulge me.” His eyes were glowing. In the half-light of the greenhouse he looked like a jungle creature himself, exotic, weird. Without a moment’s hesitation, he pranced off down the aisle toward a group of oversized bromeliads near the outer wall. Willy-nilly, Fletcher followed.

  Asenion gestured grandly.

  “Here it is! Do you see? Aechmea asenionii! Discovered in northwestern Brazil two years ago—I sponsored the expedition myself—of course, I never expected them to name it for me, but you know how these things sometimes happen—”

  Fletcher stared. The plant was a giant among giants, easily two meters across from leaf-tip to leaf-tip. Its dark green leaves were banded with jagged pale scrawls that looked like the hieroglyphs of some lost race. Out of the central cup, which was the size of a man’s head and deep enough to drown rabbits in, rose the strangest flower Fletcher ever hoped to see, a thick yellow stalk of immense length from which sprang something like a cluster of black thunderbolts tipped with ominous red globes like dangling moons. A pervasive odor of rotting flesh came from it.

  “The only specimen in North America!” Asenion cried. “Perhaps one of six or seven in the world. And I’ve succeeded in inducing it to bloom. There’ll be seed, Lew, and perhaps there’ll be offsets as well—I’ll be able to propagate it, and cross it with others—can you imagine it crossed with Aechmea chantinii, Fletcher? Or perhaps an interspecific hybrid? With Neoregelia carcharadon, say? No. Of course you can’t imagine it. What am I saying? But it would be spectacular beyond belief. Take my word for it.”

  “I have no doubt.”

  “It’s a privilege, seeing this plant in bloom. But there are others here you must see too. The puyas—the pitcairnias—there’s a clump of Dyckia marnier-lapostollei in the next room that you wouldn’t believe—”

  He bubbled with boyish enthusiasm. Fletcher forced himself to be patient. There was no help for it: he would simply have to take the complete tour.

  It went on for what seemed like hours, as Asenion led him frantically from one peculiar plant to another, in room after room. Some were actually quite beautiful, Fletcher had to admit. Oth
ers seemed excessively flamboyant, or grotesque, or incomprehensibly ordinary to his untutored eye, or downright grotesque. What struck him most forcefully of all was the depth of Asenion’s obsession. Nothing in the universe seemed to matter to him except this horde of exotic plants. He had given himself up totally to the strange world he had created here.

  But at last even Asenion’s manic energies seemed to flag. The pace had been merciless, and both he and Fletcher, drenched with sweat and gasping in the heat, paused for breath in a section of the greenhouse occupied by small gray gnarly plants that seemed to have no roots, and were held to the wall by barely visible wires.

  Abruptly Asenion said, “All right. You aren’t interested anyway. Tell me what you came here to ask me, and then get on your way. I have all sorts of things to do this afternoon.”

  “It’s about plutonium-186,” Fletcher began.

  “Don’t be idiotic. That’s not a legitimate isotope. It can’t possibly exist.”

  “I know,” Fletcher said. “But it does.”

  Quickly, almost desperately, he outlined the whole fantastic story for the young physicist-turned-botanist. The mysterious substitution of a strange element for tungsten or osmium in various laboratories, the tests indicating that its atomic number was that of plutonium but its atomic weight was far too low, the absurd but necessary theory that the stuff was a gift from some parallel universe and—finally—the fact that the new element, stable when it first arrived, rapidly began to undergo radioactive decay in a startlingly accelerative way.

  Asenion’s saturnine face was a study in changing emotions as Fletcher spoke. He seemed bored and irritated at first, then scornful, then, perhaps, furious; but not a word did he utter, and gradually the fury ebbed, turning to distant curiosity and then, finally, a kind of fascination. Or so Fletcher thought. He realized that he might be altogether wrong in his interpretations of what was going on in the unique, mercurial mind of the other man.