That left only one question unexplained: Why didn't Charlie's maps look like Earth? To answer this one, the Earthists launched a series of commando raids against the bastions of accepted geological theory and methods of geological dating. Drawing on the hypothesis that continents had been formed initially from a single granitic mass that had been shattered under the weight of immense ice caps and pushed apart by polar material rushing in to fill the gaps, they pointed to the size of the ice caps shown on the maps and stressed how much larger they were than anything previously supposed to have existed on Earth. Now, if in fact the maps showed Earth and not Minerva, that meant that the Ice Age on Earth had been far more severe than previously thought, and its effects on surface geography correspondingly more violent. Add to this the effects of the crustal fractures and vulcanism as described in Charlie's observations of Earth (not Minerva), and there was, perhaps, enough in all that to account for the transformation of Charlie's Earth into modern Earth. So, why were there no traces to be found today of the Lunarian civilization? Answer: It was clear from the maps that most of it had been concentrated on the equatorial belt. Today that region was completely ocean, dense jungle, or drifting desert—adequate to explain the rapid erasure of whatever had been left after the war and the climatic cataclysm.

The Pure Earthist faction attracted mainly physicists and engineers, quite happy to leave the geologists and geographers to worry about the bothersome details. Their main concern was that the sacred principle of the constancy of the velocity of light should not be thrown into the melting pot of suspicion along with everything else.

By entrenching themselves around the idea of Earth origins, the Pure Earthists had moved into the positions previously defended fanatically by the biologists. Now that Danchekker had led the way by introducing his fleet of Ganymean Noah's Arks, the biologists abruptly turned about-face and rallied behind their new assertion of Minervan origin from displaced terrestrial ancestors. What about Charlie's Minerva-Luna flight time and the loop delay around the Annihilator fire-control system? Something was screwed up in the interpretation of Minervan time scales that accounted for both of these. Okay, how could Charlie see Minerva from Luna? Video transmissions. Okay, how could they aim the Annihilator over that distance? They couldn't. The dish at Seltar was only a remote-control tracking station. The weapon itself was mounted in a satellite orbiting Minerva.