Two young boys, play hooky from school in order to explore an ultramodern world's fair. They take in the many marvelous scientific and industrial exhibits, obtain literature, eat food, and generally run amok.
A Southern soldier in the American Civil War is sent to reconnoiter the enemy positions and becomes trapped beneath a huge pile of rubble by Northern cannon fire.
Humanity finds a mysterious object buried beneath the lunar surface and sets off to find its origins with the help of HAL 9000, the world's most advanced super computer.
As the railroad builders advance unstoppably through the Arizona desert on their way to the sea, Jill arrives in the small town of Flagstone with the intention of starting a new life.