reports too closely, though. Why are they using an atomic warhead? I know they suppose our planet is uninhabited, but still—”

“They will watch the flash through their lunar telescopes and get a—what do they call it?—a spectroscopic analysis. That will tell them more than they know now (or think they know; much of it is erroneous) about the atmosphere of our planet and the composition of its surface. It is—call it a sighting shot, Khee. They’ll be here in person within a few oppositions. And then—”

Mars was holding out, waiting for Earth to come. What was left of Mars, that is; this one small city of about nine hundred beings. The civilization of Mars was older than that of Earth, but it was a dying one. This was what remained of it: one city, nine hundred people. They were waiting for Earth to make contact, for a selfish reason and for an unselfish one.

MARTIAN civilization had developed in a quite different direction from that of Earth. It had developed no important knowledge of the physical sciences, no technology. But it had developed social sciences to the point where there had not been a single crime, let alone a war, on Mars for fifty thousand years. And it had developed fully the parapsychological sciences of the mind, which Earth was just beginning to discover.

Mars could teach Earth much. How to avoid crime and war to begin with. Beyond those simple things lay telepathy, telekinesis, empathy….

And Earth would, Mars hoped, teach them something even more valuable to Mars: how, by science and technology—which it was too late for Mars to develop now, even if they had the type of minds which would enable them to develop these things—to restore and rehabilitate a dying planet, so that an otherwise dying race might live and multiply again.

Each planet would gain greatly, and neither would lose.

And tonight was the night when Earth would make its first sighting shot. Its next shot, a rocket containing Earthmen, or at least an [p150]  Earthman, would be at the next opposition, two Earth years, or roughly four Martian years, hence. The Martians knew this, because their teams of telepaths were able to catch at least some of the thoughts of Earthmen, enough to know their plans. Unfortunately, at that distance, the connection was one-way. Mars could not ask Earth to hurry its program. Or tell Earth scientists the facts about Mars’ composition and atmosphere which would have made this preliminary shot unnecessary.

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