Ilium Read online

  “Are there signs of the originals?” asked Orphu of Io.

  The descendents of your Shakespeare, Orphu said on tightbeam to Mahnmut.

  “Unknown,” said Asteague/Che. “The greatest resolution is just under two kilometers and we’ve seen no sign of original-human life or artifacts, other than previously mapped ruins. There is some neutrino fax activity, but it may be automated or residual. In truth, the humans are of no concern to us right now. The post-humans are.”

  My Shakespeare? You mean our Shakespeare! Mahnmut tightbeamed to the big Ionian.

  Sorry, Mahnmut. As much as I love the sonnets—and even your Bard’s plays—my own concentration has been on Proust.

  Proust! That aesthete! You’re joking!

  Not at all. There came a rumble on the subsonic spectrum of the tightband which Mahnmut interpreted as the Ionian’s laughter.

  The integrator brought up images of some of the millions of orbital habitations moving in their stately ring-dance around Earth. Many were white, others silver. As brilliant as they looked in the heavy light so close to the sun, they also looked strangely cold. And empty.

  “No shuttles. No evidence of ring-to-Earth neutrino faxing. And the convoy-bridge of heavy materials being accelerated between the rings and Mars—observed as recently as twenty Jovian years ago, two hundred forty-some Earth/pH ring years ago—is gone.”

  “You think the post-humans are gone?” asked Koros III. “Died off somehow? Or migrated?”

  “We know there was a sea change in their energy use, chronoclastic, quantum, and gravitational,” said the integrator. The unit was taller and a bit more humanoid than Mahnmut, sheathed in bright yellow surface-shield materials. His voice was soft, calm, carefully modulated. “Our interest now turns to Mars.”

  The image of the fourth planet filled the window.

  Mahnmut’s interest in Mars was marginal at best, and his images of it were from the Lost Age. This world looked nothing like the photos and holos from that era.

  Instead of a rust-red world, this recent image of Mars revealed a blue sea covering most of the northern hemisphere, the Valles Marineris river valley showing a ribbon of blue many kilometers wide connecting to that ocean. Much of the southern hemisphere remained reddish-brown, but there were also large splotches of green. The Tharsis volcanoes still ran southwest to northeast in dark procession—one with a visible smoke plume—but Olympus Mons now rose within twenty kilometers or so of a huge bay arcing in from the northern ocean. White clouds clumped and grouped across the sunlit half of the image and bright lights glowed somewhere near Hellas Basin beyond the dark edge of the terminator. Mahnmut could see a hurricane spiraling north of the Chryse Planitia coastline.

  “They terraformed it,” Mahnmut said aloud. “The posts terraformed Mars.”

  “How long ago?” asked Orphu of Io. None of the Galileans had any special interest in Mars—in any of the Inner Worlds, for that matter (except for their literature)—so this could have happened any time in the twenty-five hundred terrestrial years since the break between moravecs and humanity.

  “In the last two hundred years,” said Asteague/Che. “Perhaps in the last century and a half.”

  “Impossible.” Koros III’s statement was flat and final. “Mars could never be terraformed in so short a time.”

  “Yes, impossible,” agreed Asteague/Che. “But it was.”

  “So the posts migrated there,” said Orphu of Io.

  Little Ri Po answered. “We think not. Resolution on our observation of Mars has been a bit better than that of Earth. For instance, along the coastlines . . .”

  The window showed an area along a twisting peninsula north of where the broad Valles Marineris rivers—more of a long inland sea, actually—emptied into a bay, flowed through an isthmus, and then opened into the northern ocean. The image zoomed. All along the coast where the land came down to the sea—sometimes showing red-desert hills, elsewhere green and heavily forested plains—tiny black specks followed the shoreline. The image zoomed a final time.

  “Are those . . . sculptures?” asked Mahnmut.

  “Stone heads, we think,” said Ri Po. The image shifted and the shadow of one of the blurry images suggested a brow, a nose, a bold chin.

  “This is ridiculous,” said Koros III. “There would have to be millions of these Easter Island heads to border the entire northern ocean.”

  “We count four million, two hundred three thousand, five hundred and nine,” said Asteague/Che. “But the construction is incomplete. Note this photograph taken some months ago during Mars’s closest approach.”

  A myriad of tiny, blurry forms pulled what might be a great stone head on rollers. The stone face was looking skyward, its shadow-eyes staring straight into the space telescope. The tiny figures appeared to be attached to the heads by mutliple cables, pulling them along, Mahnmut thought, like Egyptian slaves hauling a pyramid block.

  “Human workers?” said Orphu. “Or robots?”

  “We think neither,” said Ri Po. “The size is wrong. And you notice the coloring of the figures on the spectral analysis bands.”

  “Green?” said Mahnmut. He liked literary puzzles, not real-life ones. “Green robots?”

  “Or a species of small green humanoids not previously encountered,” Asteague/Che said seriously.

  Orphus of Io rumbled subsonic laughter. “LGM,” he said aloud.

  [?] sent Mahnmut.

  Little Green Men, Orphu of Io sent on the common band and rumbled again.

  “Why were we called here?” Mahnmut asked Asteague/Che. “What does this terraforming have to do with us?”

  The integrator returned the window to transparency. The bands of Jupiter and plains of Europan ice in the evening light looked dull and muted after all the vibrant inner-system blues and whites. “We’re sending a team to Mars to investigate this and report back,” said Asteague/Che. “You’ve been chosen. You can say ‘no’ now.”

  The four remained silent on all communications spectra.

  “I said ‘report back,’ “ continued the prime integrator, “but not necessarily ‘come back.’ We have no sure way of returning you to the Jovian system. Please signal if you would like to be replaced on this mission.”

  All four remained silent.

  “All right,” said the Europan integrator. “You’ll download the specifics of the expedition in a few minutes, but let me cover the high points. We will use Mahnmut’s submersible for the actual surveillance on the planet. Ri Po and Orphu will map from orbit while Mahnmut and Koros III go to the surface. We’re especially interested in activity on and around Mons Olympos, the largest volcano. Quantum-shift activity there has been massive and inexplicable. Mahnmut will deliver Koros III to the coastline, and our Ganymedan friend will carry out reconnaissance.”

  Mahnmut knew from his records and readings that Lost Age humans had signaled pending interruption by clearing their throats. He made a throat-clearing noise. “You have to excuse my stupidity, but how do we get The Dark Lady—my submersible—to Mars?”

  “That’s not a stupid question,” said the integrator. “Orphu of Io?”

  The giant armored horseshoe crab shifted on its repellors so that various black lenses looked at Mahnmut. “It’s been centuries since we’ve sent anything in-system. And anything delivered the old-fashioned way would take half a Jovian year. We’ve decided to use the scissors.”

  Ri Po shifted in his slab niche. “I thought the scissors were going to be used only for interstellar exploration.”

  “The Five Moons Consortium has decided that this takes precedence,” said Orphu of Io.

  “I presume there will be some sort of spacecraft,” said Koros III. “Or are you going to fling us one after the other, naked, like so many chickens fired from a trebuchet?”

  Orphu’s subsonic rumble shook the slab. He obviously liked Koros’ image.

  Mahnmut had to access the common net. A trebuchet was a Lost Age human siege engine from their Level
Two civilizations—pre-steam—mechanical but much more powerful than a mere catapult, able to launch huge boulders more than a mile.

  “A spacecraft exists,” said Asteague/Che. “It has been designed to reach Mars in a few days and configured to hold Mahnmut’s submersible. The spacecraft has an atmospheric entry package for Mahnmut’s subermisible—The Dark Lady.”

  “Reach Mars in a few days,” repeated Ri Po. “What are the delta-v factors leaving Io’s flux tube?”

  “Just under three thousand gravities,” said the integrator. “Earth g’s.”

  Mahnmut, who had never experienced a gravity-load greater than Europa’s less than one-seventh Earth-g, tried to imagine 21,000 such g’s. He couldn’t.

  “During acceleration, the ship, including The Dark Lady, will be packed with gel,” said Orphu of Io. “We’ll be as comfy as circuit chips in a gelatin mold.” It was obvious that Orphu had been involved in planning the spacecraft and Ri Po in observing the two worlds. Koros III had probably had advance warning about his command role in such an expedition. It seemed to Mahnmut that only he had been left out of the preparation for this mission, probably because his role—driving The Dark Lady through the Martian seas—was so unimportant. Perhaps, he thought, I should opt out of this expedition after all.

  Proust? he tightbeamed the big Ionian.

  Too bad we aren’t going to Earth, my friend. We could visit Stratford-on-Avon. Buy a souvenir mug.

  It was an old joke between them, but in the present context, it seemed funny again. Mahnmut tightbeamed a decent simulacrum of Orphu’s heavy laughter and the big construct rumbled so heavily in return that all four of the others could hear it through the thick air.

  Ri Po was not laughing. He was obviously computing. “Such a scissors’ fling would give us an initial velocity of almost two-tenths light speed, and even after drastic magnetic scoop deceleration in-system, we’ll have an approach velocity of about one-thousandth light speed—more than 300 kilometers per second. We’ll get to Mars quickly enough, even while it’s on the far side of the sun as it is now. But has anyone given any thought as to how we might slow down once we get there?”

  “Yes,” said Orphu of Io, his rumbling abating. “We’ve given that some thought.”

  Even after thirty Jovian years of existence, Mahnmut had no one to say good-bye to on Europa. His exploration partner, Urtzweil, had been destroyed in a closing lead near Pwyll Crater eighteen J-years earlier, and Mahnmut had grown close to no other conscious entity since then.

  Sixteen hours after the conference, Conamara Chaos Central ordered dedicated orbital tugs to lift The Dark Lady out of an open lead and boost it into orbit, where hard-vac moravecs, supervised by Orphu of Io, tucked the submersible into the waiting Marscraft and let ancient inter-lunar induction haulers truck the stack downhill to Io. Mahnmut and the other three expedition moravecs had briefly discussed naming the spacecraft, but imagination failed them, the impulse faded, and from that point on they referred to it only as “the ship.”

  Like most spacecraft constructed by moravecs in the thousands of years since spacefaring began, the ship was something less than elegant, at least by classical standards. It was one hundred and fifteen meters long and was comprised primarily of buckycarbon girders, with wrinkled radiation-shield fabric wrapped around module niches, semiautonomous sniffer probes, scores of antennae, sensors, and cables. This ship was notably different from Jovian-system machines primarily because of its gleaming magnetic dipole core and its sporty outrider deflectors. Packed away in its lumpy snout were four fusion engine bells and the five horns of the Matloff/Fennelly scoop. A ten-meter-wide pimple on the stern held the folded boron sail. Neither scoop nor sail would be needed until the deceleration part of the journey and the fusion engines had nothing to do with the acceleration phase of the mission.

  Mahnmut stayed inside The Dark Lady—now packed with gel—while Koros III and Ri Po rode sixty meters away in the forward control module they’d come to call the bridge. The plan was for Ri Po to handle all navigation chores during their brief mad-mouse ride in, while Koros III served as titular commander of the expedition. The plan also called for the Ganymedan to transfer to Mahnmut’s submersible shortly before The Dark Lady—emptied of its gel—was to be dropped into the Martian atmosphere. Once in the oceans of Mars, Mahnmut was to serve as a taxi driver—delivering Koros III to whatever landing point the commanding Ganymedan chose for his land-based spying. Koros had been downloaded various specifics of the mission that would not concern Mahnmut.

  Orphu of Io had installed himself in his crèche on the outer shell of the ship behind the ten solenoid toruses and in front of the sail-cable struts, and was connected to the bridge and the submersible by every sort of voice, data, and comm link imaginable. Most of his nontechnical conversation was with Mahnmut.

  I’m still most interested in your theory of the dramatic construct of the sonnets, my friend. I hope we live long enough for you to analyze more of the cycle.

  But Proust! responded Mahnmut. Why Proust when you can spend all of your existence studying Shakespeare?

  Proust was perhaps the ultimate explorer of time, memory, and perception, replied Orphu.

  Mahnmut made a static sound.

  The scarred Ionian sent his rumble through the audio line. “I look forward to convincing you that both can be enjoyed and learned from, Mahnmut, my friend.”

  Koros III’s message came over the common line—Everyone might want to raise bandwidth on the visual lines. We’re approaching Io’s plasma torus.

  Mahnmut opened all visual feeds as requested. He preferred to watch external events through Orphu of Io’s lenses, but at the moment the more interesting views were from the forward ship cameras, and not necessarily in the visible-light spectra.

  They were accelerating toward the great red-and-yellow-blotched face of Io, coming at the moon from below the plane of the ecliptic and making ready to pass over its northern pole just before flying into the Io–Jupiter flux tube.

  During the short trip in from Europa, Orphu and Ri Po had downloaded pertinent information about this region of Jupiter space. A creature of Europa, Mahnmut had always focused primarily on sonar and some visual-light perception within the black oceans there, but now he perceived the Jovian magnetosphere as the loud, crowded place it was. Looking ahead on the decametric radio bandwidths, he could see Io’s Jupiter-thick plasma torus and, at right angles to the torus, Io’s flux tube running like wide horns to Jupiter’s north and south poles. Far beyond Jupiter and its moons, beyond the magnetopause, Mahnmut could sense the bow shock turbulence crashing like great white waves on a hidden reef, could hear the upstream Langmuir waves singing in the magnetic darkness past that reef, and could pick out the ion acoustic waves crackling after their long voyage uphill from the sun. The sun itself was little more than a very bright star from Jupiter space.

  Now, as the ship swept up and over Io and into the flux tube, Mahn-mut could hear the Whistler-mode chorus and hiss that the little moon made as it plowed through its own plasma torus, eating its own tail, as it were. He could see the deep bands of equatorial emissions and had to tone down the decametric and kilometric radio roar coming from the flux tube itself. All of Galilean space was a furnace of hard radiation and electromagnetic activity—Mahnmut had spent his whole existence with its background roar in his virtual ears—but passing from torus to flux tube so close to Jupiter sent violent cascades of tortured electrons hissing around their ship like banshees screaming to be let in a beleaguered house. It was a new experience and Mahnmut found it a bit unnerving.

  Then they were in the flux tube and Koros III shouted “Hang on!” before sound channels were drowned out by the hurricane roar.

  The Io plasma torus was a giant doughnut of charged particles stirred up within the trail of sulfur dioxide, hydrogen sulfide, and other gases left behind—and then accumulated again—by Orphu’s violent home moon. As Io sped in its fast 1.77-day orbit around Jupiter, slicing thr
ough the gas giant’s magnetic field and plowing into its own plasma torus, it created a huge electrical current between Jupiter and itself, a double-horned cylinder of incredibly concentrated magnetic surges called the Io flux tube. The tube connected to Jupiter’s north and south magnetic poles and created wild auroras there, while the horns of the flux tube itself carried a constant current of some five megaamperes and constantly produced more than two trillion watts of energy.

  The Five Moons Consortium had decided some decades ago that two trillion watts of energy would be a terrible thing to waste.

  Mahnmut watched as Io’s north pole flicked beneath them. Ejecta from various sulfur volcanoes—especially from Prometheus far south near the moon’s equator—was being spewed 140 kilometers high and higher above the pockmarked surface, as if the violent moon was shooting at them, trying to make them turn back before they reached the point of no return.

  Too late. They were already there.

  On the common forward video, Ri Po’s superimposed navigation brackets showed their proper insertion into the flux tube and projected alignment with the scissors. Jupiter rushed at them, rapidly filling the view ahead like a multi-striped wall.

  The physical blades of the scissors—that dual-armed, rotating, magnetic wave accelerator set within the natural particle accelerator of Io’s flux tube—were 8,000 kilometers long, only a fragment of the flux tube’s length of more than half a million curving kilometers connecting the north pole of Io to the north pole of Jupiter.

  But the scissors could move. As Orphu of Io had explained to Mahnmut, “Angular momentum can be a many-splendored thing, my little friend.”

  The ship nestling Mahnmut’s beloved submersible had approached Io and the flux tube—even after full acceleration from the ion-tugs—at a velocity of only some 24 kilometers per second, less than 86,000 kilometers per hour. At that speed, it would take more than four hours just to traverse the flux tube distance between Io’s north pole and Jupiter’s, e-years to reach Mars. But they had no intention of continuing on at that creeping pace.