Scrat accidentally enters a flying saucer and propels himself into outer space. He travels through the solar system (also by accident), and during his journey finds a solar system, planets, asteroids, and other celestial objects.
Neil deBuck Weasel and the opossums are happy to find space rocks, which consist of iron, carbon, and a hint of nickel. They soon learn that the rocks have unusually strong magnetic fields and attract to each other. Although largely exaggerated, this clip could be used to illustrate magnetism and the elements found on asteroids.
The group comes across a tablet, and Buck explains what it means. He states that it tells the story of several "cosmic cleansings" every 100 million years or so. He warns that another event is coming soon that will wipe out all mammals.