Where do jokes come from? Using a mighty computer called "Multivavac", Noel Meyerhof, a Grand Master, asks two questions of Multivac after feeding it all the jokes he knows to find where they came from. Would you believe extraterresterials?

Isaac Asimov has never laid claim to the title of “Mr. Science Fiction,” but he personifies science fiction in many ways. For one thing, he has grown up with the field, improving as he went; for another, he is actually a teacher of science by profession. But most significant, perhaps, is the scope of his vision, ranging (like that of science fiction itself) from the infinitely vast - as in many of his novels - to the poignantly small - as in this story… Narrated by John W. Michaels.

A research spaceship from Earth lands on Saybrook's Planet to investigate a report by an earlier colony ship. The colony ship's captain, Saybrook, had reported that the planet's abundant plant and animal life was all part of a single organism with a unified consciousness. That organism was able to induce pregnancy in all the colony ship's female animals, and all the offspring born had green patches of fur instead of eyes, a sign that they were part of the planetary organism.

As the people of Earth develop atomic power, they are recorded as having achieved maturity by the Galactic keeper of records. But when the keeper learns that they have not yet penetrated space, and that they test their atomic weapons on the planetary surface, he strikes them from the record, commenting that Earth people are 'Silly Asses'.

When the technology for twisting to other probability patterns was developed, a grateful Earth solved its overcrowding by sending people to live on Earths where plants and animals never got started. Each family could have its own planet, because there was an infinite number of such alt-Earths available, and the computers never assigned the same one twice. Trouble was - someone else had the same idea!