"Yes."

"Well." Gregor considers his next words carefully. "Assuming he's still clean and uncontaminated, we can turn him or we can ice him. If we're going to turn him, we need to do it convincingly-full Tellerization-and we'll need to come up with a convincing rationale. Use him to evangelize the astronomical community into shutting up or haring off in the wrong direction. Like Heisen berg and the Nazi nuclear-weapons program." He snaps his fingers. "Why don't we tell him the truth? At least, something close enough to it to confuse the issue completely?"

"Because he's a member of the Federation of American Scientists, and he won't believe anything we tell him without independent confirmation," Brundle mutters through one side of his mouth. "That's the trouble with using a government agency as our cover story."

They walk in silence for a minute. "I think it would be very dangerous to underestimate him," says Gregor. "He could be a real asset to us, but uncontrolled he's very dangerous. If we can't silence him, we may have to resort to physical violence. And with the number of colonies they've already seeded, we can't be sure of getting them all."

"Itemize the state of their understanding," Brundle says abruptly. "I want a reality check. I'll tell you what's new after you run down the checklist."

"Okay." Gregor thinks for a minute. "Let us see. What everyone knows is that between zero three fifteen and twelve seconds and thirteen seconds Zulu time, on October second, 'sixty-two, all the clocks stopped, the satellites went away, the star map changed, nineteen airliners and forty-six ships in transit ended up in terminal trouble, and they found themselves transferred from a globe in the Milky Way galaxy to a disk which we figure is somewhere in the Lesser Magellanic Cloud. Meanwhile the Milky Way galaxy-we assume that's what it is-has changed visibly. Lots of metal-depleted stars, signs of macroscopic cosmic engineering, that sort of thing. The public explanation is that the visitors froze time, skinned the Earth, and plated it over the disk. Luckily they're still bickering over whether the explanation is Minsky's copying, uh, hypothesis, or that guy Moravec with his digital-simulation theory."

"Indeed." Brundle kicks at a paving stone idly. "Now. What is your forward analysis?"

"Well, sooner or later they're going to turn dangerous. They have the historic predisposition toward teleological errors, to belief in a giant omnipotent creator and a purpose to their existence. If they start speculating about the intentions of a transcendent intelligence, it's likely they'll eventually ask whether their presence here is symptomatic of God's desire to probe the circumstances of its own birth. After all, we have evidence of how many technological species on the disk, ten million, twelve? Replicated many times, in some cases. They might put it together with their concept of manifest destiny and conclude that they are, in fact, doomed to give birth to God. Which is an entirely undesirable conclusion for them to reach from our point of view. Teleologists being bad neighbors, so to speak."

"Yes indeed," Brundle says thoughtfully, then titters quietly to himself for a moment.

"This isn't the first time they've avoided throwing around H-bombs in bulk. That's unusual for primate civilizations. If they keep doing that, they could be dangerous."

"Dangerous is relative," says Brundle. He titters again. Things move inside his mouth.

"Don't do do that!" Gregor snaps. He glances round instinctively, but nothing happens. that!" Gregor snaps. He glances round instinctively, but nothing happens.

"You're jumpy." Brundle frowns. "Stop worrying so much. We don't have much longer here."

"Are we being ordered to move? Or to prepare a sterilization strike?"

"Not yet." Brundle shrugs. "We have further research to continue with before a decision is reached. The Soviets have made a discovery. Their crewed-exploration program. The Korolev Korolev lucked out." lucked out."

"They-" Gregor tenses. "What did they find?" He knows about the big nuclear-powered ekranoplan, the dragon of the Caspian, searching the seven oceans for new worlds to conquer. He even knows about the small fleet they're trying to build at Archangelsk, the ruinous expense of it. But this is new. "What did they find?"

Brundle grins humorlessly. "They found ruins. Then they spent another eight weeks mapping the coastline. They've confirmed what they found, they sent the State Department photographs, survey details-the lot." Brundle gestures at the Cuban War monument, the huge granite column dominating the Mall, its shadow pointing toward the Capitol. "They found Washington DC in ruins. One hundred and forty thousand miles that way." He points due north. "They're not total idiots, and it's the first time they've found one of their own species-transfer cognates. They might be well on their way to understanding the truth. Luckily our comrades in Moscow have that side of the affair under control, but they communicated their discovery to the CIA before it could be suppressed, which raises certain headaches.

"We must make sure that nobody here here asks asks why why. So I want you to start by dealing with Sagan."

COLLECTING JAR

It's noon, and the rippling heat haze turns the horizon to fog in the distance. Maddy tries not to move too much: the cycads cast imperfect shadows, and she can feel the Venetian blinds of light burning into her pale skin. She sighs slightly as she hefts the heavy canvas sample bag out of the back of the Land Rover: John will be needing it soon, once he's finished photographing the mock-termite nests. It's their third field trip together, their farthest dash into the outback, and she's already getting used to working with John. He's surprisingly easy to get on with because he's so absorbed in his work that he's refreshingly free of social expectations. If she didn't know better, she could almost let her guard down and start thinking of him as a friend, not an employer.

The heat makes her mind drift: she tries to remember what sparked her most recent quarrel with Bob, but it seems so distant and irrelevant now-like home, like Bob arguing with her father, like their hurried courthouse wedding and furtive emigration-board hearing. All that makes sense now is the stifling heat, the glare of not-sunlight, John working with his camera out in the noonday sun where only mad dogs and Englishmen dare go. Ah, it was the washing it was the washing. Who was going to do the washing while Maddy was away on the two-day field trip? Bob seemed to think he was doing her a favor, cooking for himself and taking his clothes to the single over-used public laundry. (Some year real soon now they'd get washing machines, but not yet . . . ) Bob seemed to think he was being bighearted, not publicly getting jealous over her having a job that took her away from home with a male superior who was notoriously single. Bob seemed to think he was some kind of progressive liberated man for putting up with a wife who had read Betty Friedan and didn't shave her armpits. Fuck you, Bob, Fuck you, Bob, she thinks tiredly, and tugs the heavy strap of the sample case over her shoulder and turns to head in John's direction. There'll be time to sort things out with Bob later. For now, she's got a job to do. she thinks tiredly, and tugs the heavy strap of the sample case over her shoulder and turns to head in John's direction. There'll be time to sort things out with Bob later. For now, she's got a job to do.

John is leaning over the battered camera, peering through its viewfinder in search of . . . something. "What's up?" she asks.

"Mock-termites are up," he says, very seriously. "See the entrances?" The mock-termites are what they've come to take a look at-nobody's reported on them from close-up, but they're very visible as soon as you venture into the dusty plain. She peers at the foot of the termite mound, a baked-clay hump in the soil that seems to writhe with life. There are little pipelike holes, tunnels almost, emerging from the base of the mound, and little black mock-termites dancing in and out of the holes in never-ending streams. Little is relative-they're almost as large as mice. "Don't touch them," he warns.

"Are they poisonous?" asks Maddy.

"Don't know, don't want to find out this far from the hospital. The fact that there are no vertebrates here-" He shrugs. "We know they're poisonous to other insectoida."

Maddy puts the sample case down. "But nobody's been bitten, or died, or anything."

"Not that we know of." He folds back the lid of the case and she shivers, abruptly cold, imagining bleached bones lying unburied in the long grass of the inland plain, where no humans will live for centuries to come. "It's essential to take care out here. We could be missing for days before anyone noticed, and a search party wouldn't necessarily find us, even with the journey plan we filed."

"Okay." She watches as he takes out an empty sample jar and a label and carefully notes down time and date, distance and direction from the milestone at the heart of Fort Eisenhower. Thirty-six miles. Thirty-six miles. They might as well be on another planet. "You're taking samples?" They might as well be on another planet. "You're taking samples?"

He glances round. "Of course." Then he reaches into the side pocket of the bag and removes a pair of heavy gloves, which he proceeds to put on, and a trowel. "If you could put the case down over there?"

Maddy glances inside the case as he kneels down by the mock-termite mound. It's full of jars with blank labels, neatly segregated, impassable quarantine zones for improbable species. She looks round. John is busy with the mock-termite mound. He's neatly lopped the top off it: inside, the earth is a squirming mass of-things. Black things, white things like bits of string, and a pulp of half-decayed vegetable matter that smells damply of humus. He probes the mound delicately with the trowel, seeking something. "Look," he calls over his shoulder. "It's a queen!"

Maddy hurries over. "Really?" she asks. Following his gloved finger, she sees something the size of her left forearm, white and glistening. It twitches, expelling something round, and she feels her gorge rise. "Ugh!"

"It's just a happy mother," John says calmly. He lowers the trowel, works it in under the queen and lifts her-and a collection of hangers-on, courtiers and bodyguards alike-over the jar. He tips, he shakes, and he twists the lid into place. Maddy stares at the chaos within. What is it like to be a mock-termite, suddenly snatched up and transplanted to a mockery of home? What's it like to see the sun in an electric lightbulb, to go about your business, blindly pumping out eggs and eating and foraging for leaves, under the eyes of inscrutable collectors? She wonders if Bob would understand if she tried to tell him. John stands up and lowers the glass jar into the sample case, then freezes. "Ouch," he says, and pulls his left glove off.

"Ouch." He says it again, more slowly. "I missed a small one. Maddy, medical kit, please. Atropine and neostigmine."

She sees his eyes, pinprick pupils in the noonday glare, and dashes to the Land Rover. The medical kit, olive green with a red cross on a white circle, seems to mock her: she rushes it over to John, who is now sitting calmly on the ground next to the sample case. "What do you need?" she asks.

John tries to point, but his gloved hand is shaking wildly. He tries to pull it off, but the swollen muscles resist attempts to loosen the glove. "Atropine-" A white cylinder, with a red arrow on one side: she quickly reads the label, then pushes it hard against his thigh, feels something spring-loaded explode inside it. John stiffens, then tries to stand up, the automatic syringe still hanging from his leg. He staggers stiff-legged toward the Land Rover and slumps into the passenger seat.

"Wait!" she demands. Tries to feel his wrist. "How many of them bit you?"

His eyes roll. "Just one. Silly of me. No vertebrates." Then he leans back. "I'm going to try and hold on. Your first-aid training."

Maddy gets the glove off, exposing fingers like angry red sausages: but she can't find the wound on his left hand, can't find anything to suck the poison out of. John's breathing is labored and he twitches: he needs the hospital, but it's at least a four-hour drive away and she can't look after him while she drives. So she puts another syringe load of atropine into his leg and waits with him for five minutes while he struggles for breath hoarsely, then follows up with Adrenalin and anything else she can think of that's good for handling anaphylactic shock. "Get us back," he manages to wheeze at her between emphy semic gasps. "Samples too."

After she gets him into the load bed of the truck, she dashes over to the mock-termite mound with the spare petrol can. She splashes the best part of a gallon of fuel over the heap, coughing with the stink: she caps the jerry can, drags it away from the mound, then strikes a match and throws it flickering at the disordered insect kingdom. There's a soft whump as the igniting gas sets the mound aflame: small shapes writhe and crisp beneath an empty blue sky pierced by the glaring pinprick of S Doradus. Maddy doesn't stay to watch. She hauls the heavy sample case back to the Land Rover, loads it into the trunk alongside John, and scurries back toward town as fast as she can.

She's almost ten miles away before she remembers the camera, left staring in cyclopean isolation at the scorched remains of the dead colony.

HOMEWARD-BOUND

The big ground-effect ship rumbles softly as it cruises across the endless expanse of the Dzerzhinsky Ocean at nearly three hundred knots, homeward-bound at last. Misha sits in his cubbyhole-as shipboard political officer he rates an office of his own-and sweats over his report with the aid of a glass of Polish pear schnapps. Radio can't punch through more than a few thousand miles of air directly, however powerful the transmitters; on Earth they used to bounce signals off the ionosphere or the moon, but that doesn't work here-the other disks are too far away to use as relays. There's a chain of transceiver buoys marching out across the ocean at two-thousand-kilometer intervals, but the equipment is a pig to maintain, very expensive to build, and nobody is even joking about stringing undersea cables across a million kilometers of seafloor. Misha's problem is that the expedition, himself included, is effectively stranded back in the eighteenth century, without even the telegraph to tie civilization together-which is a pretty pickle to find yourself in when you're the bearer of news that will make the Politburo shit a brick. He desperately wants to be able to boost this up the ladder a bit, but instead it's going to be his name and his alone on the masthead.

"Bastards. Why couldn't they give us a signal rocket or two?" He gulps back what's left of the schnapps and winds a fresh sandwich of paper and carbon into his top-secret-eyes-only typewriter.

"Because it would weigh too much, Misha," the captain says right behind his left shoulder, causing him to jump and bang his head on the overhead locker.

When Misha stops swearing and Gagarin stops chuckling, the Party man carefully turns his stack of typescript face down on the desk, then politely gestures the captain into his office. "What can I do for you, boss? And what do you mean, they're too heavy?"

Gagarin shrugs. "We looked into it. Sure, we could put a tape recorder and a transmitter into an ICBM and shoot it up to twenty thousand kilometers. Trouble is, it'd fall down again in an hour or so. The fastest we could squirt the message, it would cost about a thousand rubles a character-more to the point, even a lightweight rocket would weigh as much as our entire payload. Maybe in ten years." He sits down. "How are you doing with that report?"

Misha sighs. "How am I going to explain to Brezhnev that the Americans aren't the only mad bastards with hydrogen bombs out here? That we've found the new world and the new world is just like the old world, except it glows in the dark? And the only communists we've found so far are termites with guns?" For a moment he looks haggard. "It's been nice knowing you, Yuri."

"Come on! It can't be that bad-" Gagarin's normally sunny disposition is clouded.

"You try and figure out how to break the news to them." After identifying the first set of ruins, they'd sent one of their MiGs out, loaded with camera pods and fuel: a thousand kilometers inland it had seen the same ominous story of nuclear annihilation visited on an alien civilization: ruins of airports, railroads, cities, factories. A familiar topography in unfamiliar form.

This was New York-once, thousands of years before a giant stamped the bottom of Manhattan Island into the seabed-and that was once Washington DC. Sure, there'd been extra skyscrapers, but they'd hardly needed the subsequent coastal cruise to be sure that what they were looking at was the same continent as the old capitalist enemy, thousands of years and millions of kilometers beyond a nuclear war. "We're running away like a dog that's seen the devil ride out, hoping that he doesn't spot us and follow us home for a new winter hat."

Gagarin frowns. "Excuse me?" He points to the bottle of pear schnapps.

"You are my guest." Misha pours the first cosmonaut a glass, then tops up his own. "It opens certain ideological conflicts, Yuri. And nobody wants to be the bearer of bad news."

"Ideological-such as?"

"Ah." Misha takes a mouthful. "Well, we have so far avoided nuclear annihilation and invasion by the forces of reactionary terror during the Great Patriotic War, but only by the skin of our teeth. Now, doctrine has it that any alien species advanced enough to travel in space is almost certain to have discovered socialism, if not true Communism, no? And that the enemies of socialism wish to destroy socialism and take its resources for themselves. But what we've seen here is evidence of a different sort. This was America. It follows that somewhere nearby there is a continent that was home to another Soviet Union-two thousand years ago. But this America has been wiped out, and our elder Soviet brethren are not in evidence and they have not colonized this other-America-what can this mean?"

Gagarin's brow wrinkled. "They're dead too? I mean, that the alternate-Americans wiped them out in an act of colonialist imperialist aggression but did not survive their treachery," he adds hastily.

Misha's lips quirk in something approaching a grin: "Better work on getting your terminology right the first time before you see Brezhnev, comrade," he says. "Yes, you are correct on the facts, but there are matters of interpretation interpretation to consider. No colonial exploitation has occurred. So either the perpetrators were also wiped out, or perhaps . . . Well, it opens up several very dangerous avenues of thought. Because if New Soviet Man isn't home hereabouts, it implies that something happened to them, doesn't it? Where are all the true communists? If it turns out that they ran into hostile aliens, then . . . Well, theory says that aliens should be good brother socialists. Theory and ten rubles will buy you a bottle of vodka on this one. Something is badly wrong with our understanding of the direction of history." to consider. No colonial exploitation has occurred. So either the perpetrators were also wiped out, or perhaps . . . Well, it opens up several very dangerous avenues of thought. Because if New Soviet Man isn't home hereabouts, it implies that something happened to them, doesn't it? Where are all the true communists? If it turns out that they ran into hostile aliens, then . . . Well, theory says that aliens should be good brother socialists. Theory and ten rubles will buy you a bottle of vodka on this one. Something is badly wrong with our understanding of the direction of history."

"I suppose there's no question that there's something we don't know about," Gagarin adds in the ensuing silence, almost as an afterthought.

"Yes. And that's a fig leaf of uncertainty we can hide behind, I hope." Misha puts his glass down and stretches his arms behind his head, fingers interlaced until his knuckles crackle. "Before we left, our agents reported signals picked up in America from-damn, I should not be telling you this without authorization. Pretend I said nothing." His frown returns.

"You sound as if you're having dismal thoughts," Gagarin prods.

"I am am having dismal thoughts, Comrade Colonel-General, very dismal thoughts indeed. We have been behaving as if this world we occupy is merely a new geopolitical game board, have we not? Secure in the knowledge that brother socialists from beyond the stars brought us here to save us from the folly of the imperialist aggressors, or that anyone else we meet will be either barbarians or good communists, we have fallen into the pattern of an earlier age-expanding in all directions, recognizing no limits, assuming our manifest destiny. But what if there are limits? Not a barbed-wire fence or a line in the sand, but something more subtle. Why does history demand success of us? What we know is the right way for humans on a human world, with an industrial society, to live. But this is not a human world. And what if it's a world in which we're not destined to succeed? Or what if the very circumstances that gave rise to Marxism are themselves transient, in the broader scale? What if there is a-you'll pardon me-a materialist God? We know this is our own far future we are living in. having dismal thoughts, Comrade Colonel-General, very dismal thoughts indeed. We have been behaving as if this world we occupy is merely a new geopolitical game board, have we not? Secure in the knowledge that brother socialists from beyond the stars brought us here to save us from the folly of the imperialist aggressors, or that anyone else we meet will be either barbarians or good communists, we have fallen into the pattern of an earlier age-expanding in all directions, recognizing no limits, assuming our manifest destiny. But what if there are limits? Not a barbed-wire fence or a line in the sand, but something more subtle. Why does history demand success of us? What we know is the right way for humans on a human world, with an industrial society, to live. But this is not a human world. And what if it's a world in which we're not destined to succeed? Or what if the very circumstances that gave rise to Marxism are themselves transient, in the broader scale? What if there is a-you'll pardon me-a materialist God? We know this is our own far future we are living in. Why Why would any power vast enough to build this disk bring us here?" would any power vast enough to build this disk bring us here?"

Gagarin shakes his head. "There are no limits, my friend," he says, a trifle condescendingly. "If there were, do you think we would have gotten this far?"

Misha thumps his desk angrily. "Why do you think they put us somewhere where your precious rockets don't work?" he demands. "Get up on high, one push of rocket exhaust, and you could be halfway to anywhere! But down here we have to slog through the atmosphere. We can't get away! Does that sound like a gift from one friend to another?"

"The way you are thinking sounds paranoid to me," Gagarin insists. "I'm not saying you're wrong, mind you: only-could you be overwrought? Finding those bombed cities affected us all, I think."

Misha glances out of his airliner-sized porthole: "I fear there's more to it than that. We're not unique, comrade; we've been here before. And we all died. We're a fucking duplicate, Yuri Alexeyevich, there's a larger context to all this. And I'm scared by what the Politburo will decide to do when they see the evidence. Or what the Americans will do . . ."

LAST SUPPER

Returning to Manhattan is a comfort of sorts for Gregor, after the exposed plazas and paranoid open vistas of the capital. Unfortunately, he won't be here for long-he is, after all, on an assignment from Brundle-but he'll take what comfort he can from the deep stone canyons, the teeming millions scurrying purposefully about at ground level. The Big Apple is a hive of activity, as always, teeming purposeful trails of information leading the busy workers about their tasks. Gregor's nostrils flare as he stands on the sidewalk on Lex ington and East 100th. There's an Italian restaurant Brundle recommended when he gave Gregor his briefing papers. "Their spaghetti con polpette spaghetti con polpette is to die for," Brundle told him. That's probably true, but what's inarguable is that it's only a couple of blocks away from the offices of the Exobiology Annex to Cornell's New York Campus, where Sagan is head of department. is to die for," Brundle told him. That's probably true, but what's inarguable is that it's only a couple of blocks away from the offices of the Exobiology Annex to Cornell's New York Campus, where Sagan is head of department.

Gregor opens the door and glances around. A waiter makes eye contact. "Table for one?"

"Two. I'm meeting-ah." Gregor sees Sagan sitting in a booth at the back of the restaurant and waves hesitantly. "He's already here."

Gregor nods and smiles at the astronomer-exobiologist as he sits down opposite the professor. The waiter drifts over and hands him a menu. "Have you ordered?"

"I just got here." Sagan smiles guardedly. "I'm not sure why you wanted this meeting, Mr., uh, Samsa, isn't it?" Clearly he thinks he gets the joke-a typical mistake for a brilliant man to make.

Gregor allows his lower lip to twitch. "Believe me, I'd rather it wasn't necessary," he says, entirely truthfully. "But the climate in DC isn't really conducive to clear thought or long-range planning-I mean, we operate under constraints established by the political process. We're given questions to answer, we're not encouraged to come up with new questions. So what I'd like to do is just have an open-ended informal chat about anything that you think is worth considering. About our situation, I mean. In case you can open up any avenues we ought to be investigating that aren't on the map right now."

Sagan leans forward. "That's all very well," he says agreeably, "but I'm a bit puzzled by the policy process itself. We haven't yet made contact with any nonhuman sapients. I thought your committee was supposed to be assessing our policy options for when contact finally occurs. It sounds to me as if you're telling me that we already have a policy, and you're looking to find out if it's actually a viable one. Is that right?"

Gregor stares at him. "I can neither confirm nor deny that," he says evenly. Which is the truth. "But if you want to take some guesses, I can either discuss things or clam up when you get too close," he adds, the muscles around his eyes crinkling conspiratorially.

"Aha." Sagan grins back at him boyishly. "I get it." His smile vanishes abruptly. "Let me guess. The policy is predicated on MAD, isn't it?"

Gregor shrugs then glances sideways, warningly: the waiter is approaching. "I'll have a glass of the house red," he says, sending the fellow away as fast as possible. "Deterrence presupposes communication, don't you think?" Gregor asks.

"True." Sagan picks up his bread knife and absentmindedly twirls it between finger and thumb. "But it's how the idiots-excuse me, our elected leaders-treat threats, and I can't see them responding to tool-using nonhumans as anything else." He stares at Gregor. "Let me see if I've got this right. Your committee pulled me in because there has, in fact, been a contact between humans and nonhuman intelligences-or at least some sign that there are NHIs out there. The existing policy for dealing with it was drafted sometime in the sixties under the influence of the hangover left by the Cuban war, and it basically makes the conservative conservative assumption that any aliens are green-skinned Soviets and the only language they talk is nuclear annihilation. This policy is now seen to be every bit as bankrupt as it sounds, but nobody knows what to replace it with because there's no data on the NHIs. Am I right?" assumption that any aliens are green-skinned Soviets and the only language they talk is nuclear annihilation. This policy is now seen to be every bit as bankrupt as it sounds, but nobody knows what to replace it with because there's no data on the NHIs. Am I right?"

"I can neither confirm nor deny that," says Gregor.

Sagan sighs. "Okay, play it your way." He closes his menu. "Ready to order?"

"I believe so." Gregor looks at him. "The spaghetti con polpette spaghetti con polpette is really good here," he adds. is really good here," he adds.

"Really?" Sagan smiles. "Then I'll try it."

They order, and Gregor waits for the waiter to depart before he continues. "Suppose there's an alien race out there. More than one. You know about the multiple copies of Earth. The uninhabited ones. We've been here before. Now let's see . . . Suppose the aliens aren't like us. Some of them are recognizable, tribal primates who use tools made out of metal, sea-dwelling ensemble entities who communicate by ultrasound. But others-most of them-are social insects who use amazingly advanced biological engineering to grow what they need. There's some evidence that they've colonized some of the empty Earths. They're aggressive and territorial, and they're so different that . . . Well, for one thing, we think they don't actually have conscious minds except when they need them. They control their own genetic code and build living organisms tailored to whatever tasks they want carried out. There's no evidence that they want to talk to us, and some evidence that they may have emptied some of those empty Earths of their human population. And because of their, um, decentralized ecosystem and biological engineering, conventional policy solutions won't work. The military ones, I mean."

Gregor watches Sagan's face intently as he describes the scenario. There is a slight cooling of the exobiologist's cheeks as his peripheral arteries contract with shock: his pupils dilate and his respiration rate increases. Sour pheromones begin to diffuse from his sweat ducts and organs in Gregor's nasal sinuses respond to them.

"You're kidding?" Sagan half asks. He sounds disappointed about something.

"I wish I were." Gregor generates a faint smile and exhales breath laden with oxytocin and other peptide messengers fine-tuned to human metabolism. In the kitchen, the temporary chef who is standing in for the regular one-off sick, due to a bout of food poisoning-will be preparing Sagan's dish. Humans are creatures of habit: once his meal arrives, the astronomer will eat it, taking solace in good food. (Such a shame about the chef.) "They're not like us. SETI assumes that NHIs are conscious and welcome communication with humans and, in fact, that humans aren't atypical. But let's suppose that humans are are atypical. The human species has only been around for about a third of a million years, and has only been making metal tools and building settlements for ten thousand. What if the default for sapient species is measured in the millions of years? And they develop strong defense mechanisms to prevent other species moving into their territory?" atypical. The human species has only been around for about a third of a million years, and has only been making metal tools and building settlements for ten thousand. What if the default for sapient species is measured in the millions of years? And they develop strong defense mechanisms to prevent other species moving into their territory?"

"That's incredibly depressing," Sagan admits after a minute's contemplation. "I'm not sure I believe it without seeing some more evidence. That's why we wanted to use the Arecibo dish to send a message, you know. The other disks are far enough away that we're safe, whatever they send back: they can't possibly throw missiles at us, not with a surface escape velocity of twenty thousand miles per second, and if they send unpleasant messages, we can stick our fingers in our ears."

The waiter arrives and slides his entree in front of Sagan.

"Why do you say that?" asks Gregor.

"Well, for one thing, it doesn't explain the disk. We couldn't make anything like it-I suppose I was hoping we'd have some idea of who did. But from what you're telling me, insect hives with advanced biotechnology . . . That doesn't sound plausible."

"We have some information on that." Gregor smiles reassuringly. "For the time being, the important thing to recognize is that the species who are on the disk are roughly equivalent to ourselves in technological and scientific understanding. Give or take a couple of hundred years."

"Oh." Sagan perks up a bit.

"Yes," Gregor continues. "We have some information-I can't describe our sources-but anyway. You've seen the changes to the structure of the galaxy we remember. How would you characterize that?"