"We men of Antares colonized this small world many generations ago. This world was then the moon of a planet in the system of **** near our own star...

"But then came unforeseen catastrophe. A dark star was approaching the system **** of which this moon was a member. The passing dark star came so close that its huge gravitational pull dragged this moon from its orbit and flung it off into space. The moon left that system and drifted steadily out into the vast interstellar void...

"But out in the face of the deep a terrible thing began to happen. The drifting moon had entered a region of terrific cosmic radiation. It was an area of space in which cosmic radiation swept in a concentrated current, due to **** and other obscure factors of space-warp The result was that all life upon this little world was drenched by constant penetating radiation which soon caused a subtle and fearful change...

"Evolution began to speed up terrifically upon our drifting world. The unprecedented radiation produced **** and other changes in the genes of every living species, which caused a tremendous flowering of new mutations Each species of animal and plant life on the world began a rapid new evolution. And our human species, too, began to evolve.