dwellers, hunters, makers of simple weapons and tools chipped out of stone. But on Minerva, a new technological civilization already existed: the Lunarians-descended from the imported stock and from the same early ancestors as ourselves, human in every detail of anatomy.
'I won’t dwell on the problems that confronted the developing Lunarian civilization-they’re well-known by now. Their history was one long story of war and hardship enacted around a racial quest to escape from their dying world. Their difficulties were compounded by a chronic shortage of minerals, possibly because the planet was naturally deficient, or possibly because it had been thoroughly exploited by the Ganymeans. At any rate, the warring factions polarized into two superpowers, and in the showdown that followed they destroyed themselves and the planet.'
Hunt paused again at this point to allow another period of consolidation for the audience. This time, however, there was complete silence. Nothing he had said so far was new, but he had formed a set selected from the thousand and one theories and speculations that had raged around Navcomms for as long as many could remember. The silent watchers in the theater sensed that the real news was still to come.
'Let’s stop for a moment and examine how well this account fits in with the evidence we have. First, the original problem of Charlie’s human form. Well, that’s answered: He was human-descended from the same ancestors as the rest of us and requiring nothing as unlikely as a parallel line to explain him. Second, the absence of any signs of the Lunarians on Earth. Well, the reason is quite obvious: They never were on Earth. Third, all the attempts to reconcile the surface geography of Charlie’s world with Earth become unnecessary, since by this account they were indeed two different planets.
'So far so good, then. This by itself, however, does not explain all the facts. There are some additional pieces of evidence which must be taken into account by any theory that claims to be comprehensive. They can be summarized in the following questions:
'One: How could Charlie’s voyage from Minerva to our Moon have taken only two days?
'Two: How do we explain a weapons system, consistent with the Lunarian level of technology, that was capable of accurate registration over a range extending from our Moon to Minerva?
'Three: How could the loop feedback delay in the fire-control system have been substantially less than the minimum of twenty-six minutes that could have applied over that distance?
'Four: How could Charlie distinguish surface features of Minerva when he was standing on our Moon?'
Hunt looked out from the screen and allowed plenty of time for the audience to reflect on these questions. He stubbed out his cigarette and leaned forward toward the camera, his elbows corning to rest on the desk.
'There is, in my submission, only one explanation which is capable of satisfying these apparently nonsensical requirements. And I put it to you now. The moon that orbited Minerva from time immemorial up until the time of these events fifty thousand years ago-and the Moon that shines in the sky above Earth today-are one and the same!'
Nothing happened for about three seconds.
Then gasps of incredulity erupted from around the darkened room. People gesticulated at their neighbors while some turned imploringly for comment from the row behind. Suddenly the whole theater was a turmoil of muttered exchanges.
'Can’t be!'
'By God-he’s right!'
'Of course… of course…
'Has to be…'
'Garbage!'
On the screen Hunt stared out impassively, as if he were watching the scene. His allowance for the probable reaction was well timed. He resumed speaking just as the confusion of voices was dying away.
'We know that the moon Charlie was on was our Moon-because we found him there, because we can identify the areas of terrain he described, because we have ample evidence of a large-scale Lunarian presence there, and because we have proved that it was the scene of a violent exchange of nucleonic and nuclear weapons. But that same place must also have been the satellite of Minerva. It was only a two-day flight from the planet-Charlie says so and we’re confident we can interpret his time scale. Weapons were sited there which could pick off targets on Minerva, and observations of hits were almost instantaneous; and if all that is not enough, Charlie could stand not ten yards from where we found him and distinguish details of Minerva’s surface. These things could only be true if the place in question was within, say, half a million miles of Minerva.
'Logically, the only explanation is that both moons were one and the same. We’ve been asking for a long time whether the Lunarian civilization developed on Earth or whether it developed on Minerva. Well, from the account I’ve given, it’s obvious it was Minerva. We thought we had two contradictory sets of information, one telling us it was Earth and the other telling us it wasn’t. But we had misinterpreted the data. It wasn’t telling us anything to do with Earth or Minerva at all-it was telling us about Earth’s or Minerva’s moon! Some facts told us we were dealing with Earth’s moon while others told us we were dealing with Minerva’s moon. As long as we insisted on introducing, quite unconsciously, the notion that the two moons were different, the conflict between these sets of facts couldn’t be resolved. But if, purely within the logical constraints of the situation, we introduce the postulate that both moons were the same, that conflict disappears before our eyes.'
Shock seemed to have overtaken the audience. At the front somebody was muttering, 'Of course… of course…' half to himself and half aloud.
'All that remains is to reconcile these propositions with the situation we observe around us today. Again, only one explanation is possible. Minerva exploded and dispersed to become the Asteroid Belt. The greater part of its mass, we’re fairly sure, was thrown into the outer regions of the Solar System and became Pluto. Its moon, although somewhat shaken, was left intact. During the gravitational upheaval that occurred when its parent planet broke up, the satellite’s orbital momentum around the Sun was reduced and it began to fall inward.
'We can’t tell how long the orphaned moon plunged steadily nearer the Sun. Maybe the trip lasted months, maybe years. Next comes one of those million-to-one chances that sometimes happen in nature. The trajectory followed by the moon brought it close to Earth, which had been pursuing its own solitary path around the Sun ever since the beginning of time!' Hunt paused for a few seconds. 'Yes, I repeat, solitary path! You see, if we are to accept what I believe to be the only satisfactory explanation open to us, we must accept also its consequence: that until this point in time, some fifty thousand years ago, planet Earth had no moon! The two bodies drew close enough for their gravitational fields to interact to the point of mutual capture; the new, common orbit turned out to be stable, and Earth adopted a foundling it has kept right up to this day.
'If we accept this account, many of the other things that have been causing problems suddenly make sense. Take, for example, the excess material that covers most of Lunar Farside and has been shown to be of recent origin, and coupled with that, the dating of all Farside craters and some Nearside ones to around the time we’re talking about. Now we have a ready explanation. When Minerva blew up, what is now Luna was sitting there right in the way of all the debris. That’s where the meteorite storm came from. That’s how practically all evidence of the Lunarian presence on Luna was wiped out. There’s probably no end to remains of their bases, installations, and vehicles still there waiting to be uncovered-a thousand feet below the Farside surface. We think that the Annihilator emplacement at Seltar was on Farside. That suggests that what is Farside to Earth today was Nearside to Minerva; hence it makes sense that most of the meteorite storm landed where it did.
'Charlie appears to have referred to compass directions different from ours on the Lunar surface, implying a different north-south axis. Now we see why. Some people have asked why, if Luna suffered such an intense bombardment, there should be no signs of any comparable increase in meteorite activity on Earth at the time. This too now makes sense: When Minerva blew up, Luna was in its immediate vicinity but Earth wasn’t. And a last point on Lunar physics-We’ve known for half a century that Luna is formed from a mix of rocky compounds different from those found on Earth, being low in volatiles and rich in refractories. Scientists have speculated for a long time that possibly the Moon was formed in another part of the Solar System. This indeed turns out to be true if what I’ve said is correct.
'Some explanations have suggested that the Lunarians set up advanced bridgeheads on Luna. This enabled their evident presence there to be reconciled with evolutionary origins on Minerva, but raised an equally problematical question: Why were they struggling to master interplanetary space-flight technology when they must have had it already? In the account I have described, this problem disappears. They had reached their own moon, but were still some ways from being able to move large populations to anyplace as remote as Earth. Also, there is
