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'.

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?

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.

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.

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!

In this 1972 treatise, Isaac Asimov takes the listener on an historic journey through the development of man's understanding of electricity, chemistry, and - ultimately - nuclear energy. Asimov's incomparable ability to simplify the complex is apparent as he guides you through the milestones of scientific thought that connected ideas about electricity and magnetism to the nature of matter, and led to the advances in discovery through the first half of the 20th century that resulted in the harnessing of previously unknown energy directly from the heart of the atom.

Only a few know the terrifying truth - an outcast Earth scientist, a rebellious alien inhabitant of a dying planet, a lunar-born human intuitionist who senses the imminent annihilation of the Sun... They know the truth - but who will listen? They have foreseen the cost of abundant energy - but who will believe?These few beings, human and alien, hold the key to the Earth's survival.

Isaac Asimov, known primarily for his science fiction stories, was also a scientist. In cooperation with the Senior Scholastic magazine, he composed this wonderful and fascinating work of historical nonfiction. Twenty-six far-reaching discoveries and the twenty-nine scientists who made them—from Archimedes, who boasted he could move the world, to Goddard, who sent the first liquid-fuel rocket toward space.

The tale takes place on one of Jupiter's moons, Ganymede, where a home sick Olaf Johnson shares the legend of Santa Claus with the "Ossies" (local inhabitants) who are employed by the same company he works for. The Ossies' embrace the story whole-heartedly and declare a shut-down in production unless "Sante" pays them a visit. Will Olaf be able to re-create this Earth legend in outer space? Will Olaf keep his job after Commander Pelham (his boss) learns what he has done? Listen and find out!

This classic science fiction masterwork by Isaac Asimov weaves stories about robots, humanity, and the deep questions of existence into a novel of shocking intelligence and heart.