"I am stating that Charlie is not just a distantly related cousin of man—he is our direct ancestor!" Danchekker did not wait for comment but pressed on in the same insistent tone: "And I believe that I can give you an explanation of our own origins which is fully consistent with these deductions." An abrupt silence fell upon the room. Danchekker regarded his colleagues for a few seconds. When he spoke again, his voice had fallen to a calmer and more objective note.

"From Charlie's account of his last days, we know that some Lunarians were left alive on the Moon after the fighting died down. Charlie himself was one of them. He did not survive for long, but we can guess that there were others—desperate groups such as the ones he described—scattered across that Lunar surface. Many would have perished in the meteorite storm on Farside, but some, like Charlie's group, were on Nearside when Minerva exploded and were spared the worst of the bombardment. Even a long time later, when the Moon finally stabilized in orbit around Earth, a handful of survivors remained who gazed up at the new world that hung in their sky. Presumably some of their ships were still usable—perhaps just one, or two, or a few. There was only one way out. Their world had ceased to exist, so they took the only path open to them and set off on a last, desperate attempt to reach the surface of Earth. There could be no way back—there was no place to go back to.

"So we must conclude that their attempt succeeded. Precisely what events followed their emergence out into the savagery of the Ice Age we will probably never know for sure. But we can guess that for generations they hung on the very edge of extinction. Their knowledge and skills would have been lost. Gradually they reverted to barbarism, and for forty thousand years were lost in the midst of the general struggle for survival. But survive they did. Not only did they survive, they consolidated, spread, and flourished. Today their descendants dominate the Earth just as they dominated Minerva—you, I, and the rest of the human race."

A long silence ensued before anybody spoke. When somebody did, the tone was solemn. "Chris, assuming for now that everything was like you've said, a point still bothers me: If we and the Lunarians both came from the Minervan line, what happened to the other line? Where did the branch that was developing on Earth go?"