Neil deGrasse Tyson explains radioactive decay. He explains how we can determine the age of a rock using meteorites and illustrates that atoms undergo nuclear transmutations over time until they become stable elements.
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 animals from the ice age anticipate the flood thanks to Manny's warnings. While grouped together, the water breaks through the ice dam, causing flooding and large rocks to break from the pressure. All of the animals run to safety.