Bill Nye goes to the depths of the Earth (literally) to explain how the Earth's surface and its inner mantle differ. Written by
Did You Know?
The music video at the end of this episode, "Crust" by Magmadonna, is a parody of Madonna's "Vogue." See more
Spoofs Jonny Quest
Performed by Magmadonna
Parody of "Vogue" by Madonna See more