Danchekker was more successful in a different direction. From an analysis of the sizes and shapes of Charlie's blood vessels and associated muscle tissues, he produced equations describing the performance of Charlie's circulatory system. From these he then derived a set of curves that showed the proportions of body heat that would be retained and lost for any given body temperature and outside temperature. He came up with a figure for Charlie's normal body temperature from some of Schorn's figures that were not suspect and were based on the assumption that, as in the case of terrestrial mammals, the process of evolution would have led to Charlie's body regulating its temperature to such a level that the chemical reactions within its cells would proceed at their most efficient rates. By substituting this figure back into his original equations, Danchekker was able to arrive at an estimate of the outside temperature or, more precisely, the temperature of the environment in which Charlie seemed best adapted to function. Allowing for error, it came out at somewhere between two and nine degrees Celsius.
With Schorn's failure to produce a reliable indication of the length of the Lunarian day, there was still no way of assigning any absolute values to the calendar, although sufficient corroborating evidence had been forthcoming from various sources to verify beyond reasonable doubt that it was indeed a calendar. As more clues to Lunarian electrical units were found by Electronics, an alternative approach to obtaining the elusive Lunarian unit of time suggested itself. If Mathematics could untangle the equations of electrical oscillation, they should be able to manipulate the quantities involved in such a way to express the two constants denoting the dielectric permittivity and magnetic permeability of free space in Lunarian units. The ratio of these constants would yield the velocity of light, expressed in Lunarian units of distance per Lunarian units of time. The units for representing distance were understood already; therefore, those used for measuring time would be given automatically.
* * *
All this activity in UNSA naturally attracted widespread public attention. The discovery of a technologically advanced civilization from fifty thousand years in the past was not something that happened very often. Some of the headlines flashed around the World News Grid when the story was released, a few weeks after the original find, were memorable: MAN ON
MOON BEFORE ARMSTRONG; some were hilarious: EXTINCT CIVILIZATION ON MARS; some were just wrong: CONTACT MADE WITH ALIEN INTELLIGENCE. But most summed up the situation fairly well.
In the months that followed, UNSA's public relations office in Washington, long geared to conducting steady and predictable dealings with the news media, reeled under a deluge of demands from hard-pressed editors and producers all over the globe. Washington struggled valiantly for a while, but in the end did the human thing, and delegated the problem to Navcomms' local PR department at Houston. The PR director at Houston found a ready-made clearinghouse of new information in the form of Group L, right on his doorstep, so still another dimension was added to Hunt's ever growing work load. Soon, press conferences, TV documentaries, filmed interviews, and reporters became part of his daily routines; so did the preparation of weekly progress bulletins. Despite the cold objectivity and meticulous phrasing of these bulletins, strange things seemed to happen to them between their departure from the offices of Navcomms and their arrival on the world's newspaper pages and wall display screens. Even stranger things happened in the minds of some people who read them.
One of the British Sunday papers presented just about all of the Old Testament in terms of the interventions of space beings as seen through the eyes of simple beholders. The plagues of Egypt were ecological disruptions deliberately brought about as warnings to the oppressors; flying saucers guided Moses through the Red Sea while the waters were diverted by nucleonic force fields; and the manna from heaven was formed from the hydrocarbon combustion products of thermonuclear propulsion units. A publisher in Paris observed the results, got the message, and commissioned a free-lancer to reexamine the life of Christ as a symbolic account of the apparent miracle workings of a Lunarian returning to Earth after a forty-eight-thousand-year meditation in the galactic wilderness.
"Authentic" reports that the Lunarians were still around abounded. They had built the pyramids, sunk Atlantis, and dug the Bosporus. There were genuine eyewitness accounts of Lunarian landings on Earth in modern times. Somebody had held a conversation with the pilot of a Lunarian spaceship two years before in the middle of the Colorado Desert. Every reference ever recorded to supernatural phenomena, apparitions, visitations, miracles, saints, ghosts, visions, and witches had a Lunarian connection.
But as the months passed and no dramatic revelations unfolded, the world began to turn elsewhere for new sensations. Reports of further findings became confined to the more serious scientific journals and proceedings of the professional societies. But the scientists on the project continued their work undisturbed.
Then a UNSA team erecting an optical observatory on the Lunar Farside detected unusual echoes on ultrasonics from about two hundred feet below the surface. They sank a shaft and discovered what appeared to be all that was left of the underground levels of another Lunarian base, or at any rate, some kind of construction. It was just a metal-walled box about ten feet high and as broad and as long as a small house; one end was missing, and about a quarter of the volume enclosed had filled up with dust and rock debris. In the space that was left at the end, they found the charred skeletons of eight more Lunarians, some pieces of furniture, a few items of technical equipment, and a heap of sealed metal containers. Whatever had formed the remainder of the structure that this gallery had been part of was gone without a trace.
The metal containers were later opened by the scientists at Westwood. Inside the cans was a selection of assorted foodstuffs, well preserved despite having been cooked. Presumably, whatever had done the cooking had also cooked the Lunarians. Most of the cans contained processed vegetables, meats, and sweet preparations; a few, however, yielded a number of fish, about the size of herrings and preserved intact.
When Danchekker's assistant dissected one of the fish and began looking inside, he couldn't make sense of what he found, so he called the professor down to the lab to ask what he made of it. Danchekker didn't go home until eight o'clock the next morning. A week later he announced to an incredulous Vic Hunt: "This specimen never swam in any of our oceans; it did not evolve from, nor is it in any way related to, any form of life that has ever existed on this planet!"
Chapter Eleven
The Apollo Seventeen Mission, in December 1972, had marked the successful conclusion to man's first concerted effort to reach and explore first-hand a world other than his own. After the Apollo program, NASA activities were restricted, mainly as a result of the financial pressures exerted on the USA by the economic recessions that came and went across the Western world throughout that decade, by the politically inspired oil crisis and various other crises manufactured in the Middle East and the lower half of Africa, and by the promotion of the Vietnam War. During the mid and late seventies, a succession of unmanned probes were dispatched to Mars, Venus, Mercury, and some of the outer planets. When manned missions were resumed in the 1980's, they focused on the development of various types of space shuttle and on the construction of permanently manned orbiting laboratories and observatories, the main objective being the consolidation of a firm jumping-off point prior to resumed expansion outward. Thus, for a period, the Moon was left once more on its own, free to continue its billion-year contemplation of the Universe without further interruption by man.
The information brought back by the Apollo astronauts finally resolved the conflicting speculations concerning the Moon's nature and origins that had been mooted by generations of Earth-bound observers. Soon after the Solar System was formed, 4,500 million years ago, give or take a few, the Moon became molten to a considerable depth, possibly halfway to the center; the heat was generated by the release of gravitational energy as the Moon continued to accumulate. During
the cooling that followed, the heavier, iron-bearing minerals sank toward the interior, while the less dense, aluminum-rich ones floated to the surface to form the highland crust. Continual bombardment by meteorites stirred up the mixture and complicated the process to some degree but by 4,300 million years ago the formation of the crust was virtually complete. The bombardment continued until 3,900 million years ago, by which time most of the familiar surface features already existed. From then until 3,200 million years ago, basaltic lavas flowed from the interior, induced in some places by remelting due to concentrations of radioactive heat sources below the surface, to fill in the impact basins and create the darker maria. The crust continued cooling to greater depths until molten material could no longer penetrate. Thereafter, all remained unchanging through the ages. Occasionally an additional impact crater appeared and falling dust gradually eroded the top millimeter of surface, but essentially, the Moon became a dead planet.
This history came from detailed observations and limited explorations of Nearside. Orbital observations of Farside suggested that much of the same story applied there also, and since this sequence was consistent with existing theory, nobody doubted its validity for many years after Apollo. Of course, details remained to be added, but the broad picture was convincingly clear. However, when man returned to the Moon in strength and to stay, ground exploration of Farside threw up a completely different and totally unexpected story.
Although the surface of Farside looked much the same as Nearside to the distant observer, it proved at the microscopic level to have undergone something radically different in its history. Furthermore, as bases, launch sites, communications installations, and all the other paraphernalia that accompanied man wherever he went, began proliferating on Nearside, the methodical surface coverage that this entailed produced oddities there, too.
All the experiments performed on the rock samples brought back from the eight sites explored before the mid-seventies gave consistent results supporting the orthodox theories. When the number of sites grew to thousands, by far the majority of additional data confirmed them—but some curious exceptions were noted, exceptions which seemed to indicate that some of the features on Nearside ought, rightfully, to be on Farside.
None of the explanations hazarded were really conclusive. This made little difference to the executives and officers of UNSA, since by that time the pattern of Lunar activity had progressed from that of pure scientific research to one of intense engineering operations. Only the academic fraternity of a few universities found time to ponder and correspond on the spectral inconsistencies between dust samples. So for many years the well-documented problem of "lunar hemispheric anomalies" remained filed, along with a million and one other items, in the "Awaiting Explanation" drawer of science.
* * *
A methodical review of the current state of knowledge in any branch of science that might have a bearing on the Lunarian problem was a routine part of Group L's business. Anything to do with the Moon was, naturally, high on the list of things to check up on, and soon the group had amassed enough information to start a small library on the subject. Two junior physicists, who didn't duck quickly enough when Hunt was giving out assignments, were charged with the Herculean task of sifting through all this data. It took some time for them to get around to the topic of hemispheric anomalies. When they did, they found reports of a series of dating experiments performed some years previously by a nucleologist named Kronski at the Max Planck Institute in Berlin. The data that appeared in those reports caused the two physicists to drop everything and seek out Hunt immediately.
After a long discussion, Hunt made a vi-phone call to a Dr. Saul Steinfield of the Department of Physics of the University of Nebraska, who specialized in Lunar phenomena. As a consequence of that call, Hunt made arrangements for the deputy head of Group L to take charge for a few days, and he flew north to Omaha early the next morning. Steinfield's secretary met Hunt at the airport, and within an hour Hunt was standing in one of the physics department laboratories, contemplating a three-foot-diameter model of the Moon.
"The crust isn't evenly distributed," Steinfield said, waving toward the model. "It's a lot thicker on Farside than on Nearside—something that has been known for a long time, ever since the first artificial satellites were hung around the Moon in the nineteen sixties. The center of mass is about two kilometers away from the geometric center."
"And there's no obvious reason," Hunt mused.
Steinfield's flailing arm continued to describe wild circles around the sphere in front of them. "There's no reason for the crust to solidify a lot thicker on one side, sure, but that doesn't really matter, because that's not the way it happened. The material that makes up the Farside surface is much younger than anything anybody ever believed existed on the Moon in any quantity up until about, ah, thirty or so years back—one hell of a lot younger! But you know that—that's why you're here."
"You don't mean it was formed recently," Hunt stated.
Steinfield shook his head vigorously from side to side, causing the two tufts of white hair that jutted from the sides of his otherwise smooth head to wave about in a frenzy. "No. We can tell that it's about as old as the rest of the Solar System. What I mean is—it hasn't been where it is very long."
He caught Hunt's shoulder and half turned him to face a wall chart showing a sectional view through the Lunar center. "You can see it on this. The red shell is the original outer crust going right around—it's roughly circular, as you'd expect. On Farside—here—this blue stuff sits on top of it and wasn't added very long ago."
"On top of what used to be the surface."
"Exactly. Somebody dumped a couple of billion tons of junk down on the old crust—but only on this side."
"And that's been verified pretty conclusively?" Hunt asked, just to be doubly sure.
"Yeah . . . yeah. Enough bore holes and shafts have been sunk all over Farside to tell us pretty closely where the old surface was. I'll show you something over here . . ." A major section of the far wall comprised nothing but rows of small metal drawers, each with its own neatly lettered label, extending from floor to ceiling. Steinfield walked across the room, and stooped to scan the labels, at the same time mumbling to himself semi-intelligibly. With a sudden "That's it!" he pounced on one of the drawers, opened it, and returned bearing a closed glass container about the size of a small pickle jar. It contained a coarse piece of a light gray rocky substance that glittered faintly in places, mounted on a wire support.
"This is fairly common KREEP basalt form Farside. It—"
"'Creep'?"
"Rich in potassium—that is, K—rare earth elements, and phosphorus: KREEP."
"Oh—I see."
"Compounds like this," Steinfield continued, "make up a lot of the highlands. This one solidified around 4.1 billion years ago. Now, by analyzing the isotope products produced by cosmic-ray exposure, we can tell how long it's been lying on the surface. Again, the figure for this one comes out at about 4,100 million years."
Hunt looked slightly puzzled. "But that's normal. It's what you'd expect, isn't it?"
"If it had been lying on the surface, yes. But this came from the bottom of a shaft over seven hundred feet deep! In other words, it was on the surface for all that time—then suddenly it's seven hundred feet down." Steinfield gestured toward the wall chart again. "As I said, we find the same thing all over Farside. We can estimate how far down the old surface used to be. Below it we find old rocks and structures that go way back, just like on Nearside; above it everything's a mess—the rock all got pounded up and lots of melting took place when the garbage came down, all the way up to what's now the surface. It's what you'd expect."
Hunt nodded his agreement. The energy released by that amount of mass being stopped dead in its tracks would have been phenomenal.
"And nobody knows where it came from?" he asked.
Steinfield repeated his head-shaking act. "Some people say that a big meteorite shower mu
st have got in the way of the Moon. That may be true—it's never been argued conclusively one way or the other. The composition of the garbage isn't really like a lot of meteorites, though—it's closer to the Moon itself. It's as if they were made out of the same stuff—that's why it looks the same from higher up. You have to look at the microstructure to see the things I've been talking about."
Hunt examined the specimen curiously for a while in silence. At length he laid it carefully on the top of one of the benches. Steinfield picked it up and returned it to its drawer.
"Okay," Hunt said as Steinfield rejoined him. "Now, what about the Farside surface?"
"Kronski and company."
"Yes—as we discussed yesterday."
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