A 19th century inventor travels 800,000 years into the future and learns of the advancement of civilization.

Wall-E observes the effects of technological advances on society. The citizens enjoy many conveniences, and as a result live an easy, yet dystopic, existence.

Charlie explains radiocarbon dating and how it is used to calculate the approximate age of an object. To make his explanation more concrete, he uses an analogy involving a refrigerator and the number of ice cubes in it.

Lucy travels through time to view the Earth at various periods in the past. As she travels, the setting behind her gradually changes in a timelapse. She visits the dinosaurs and eventually meets Lucy the Australopithecus.

Lisa creates a science project to prove that soft drinks can dissolve a tooth. After Bart shocks her with static electricity, she transmits that shock to the tooth and ends up accidentally creating a micro civilization full of life. She watches the civilization advance, and after Bart comes in and wreaks havoc on the micro world, the people of the world get their revenge on him.