Scrat places a nut on the ground, causing the Earth to split in half. He travels down the layers of the Earth and chases the nut on the Earth's core. This clip comically shows how the different continents and many of Earth's iconic structures formed.
The Planeteers explain what an aquifer is to the chairman of the reservation and what the pumping operation is doing the ground surrounding it. They explain the dangers of pumping from the aquifer and the effects it can have on the wildlife and environment.
Will interviews Richard Westbrook, an official with the Environmental Protection Agency (EPA). He has a pessimistic view of the challenges involving climate change and suggests that the climate debate is long over: we're too late. He also mentions some impacts of climate change: mass migrations, food and water shortages, endless wildfires, and massive storms.
Hannah instructs the group to go down into the chasm, as it may be their only hope out of the cave. Professor Anderson is the first to climb down, and Sean follows but takes much longer, as he is frightened. During the descent, Professor Anderson notices some metamorphic rocks and tells Sean about them. He loses his balance and is put into what he initially thought was a perilous situation.