Bill Nye is obssessed with erosion and explains that rocks change over time. He explains what causes weathering (although he calls it erosion): water, ice, wind, sand, and chemicals. He illustrates the process of erosion in his lab.

As the main character first introduces his reality of planet Earth, we are shown the changes within the climate.

Describes the Essenes, a Jewish sect in the time of the Romans with apocalyptic beliefs. The Essenes withdrew from wider civilization and lived simply in the Judean desert. Some of their writing was discovered preserved in caves of the area in the 20th century, often known as the Dead Sea Scrolls.

A boy and his tribe, the Pawnee nation, gets involved in a fight with another tribe. They were successful at the cost of the boy's horse getting shot. Fortunately, the boy finds another horse and celebrates with his tribe as he finds more.

How the Rocky Mountains were formed and what they are used for today.