Beakman explains how to create a bouncing egg by putting it in a jar of vinegar for a few days. He says the shell is hard because it's made of minerals and the aceitic acid in vinegar breaks down those minerals leaving behind the rubbery texture.

The Mineral Explorers travel to Najuvan, Spain, the source of pyrite. The explorers discuss one characteristic of pyrite that is hard to believe: its perfect cube form.

Lowly Worm and Huckle Cat wonder about what kinds of gems and metals could be buried under Busytown. They think about the mining process that brings us things like jewels, iron, and more!

On their trip to a cave, Papa explains to the cubs what the makeup of the cave walls is.

Bill Nye explains what volcanoes are, how they're formed, and what causes an eruption. He then explains the impact of volcanoes on the earth's geography.