Explores the secrets of the Earth, answering such questions as what is at the center of the Earth? Why is seawater salty? How was our atmosphere created? What does the ocean floor look like?.
Explores the secrets of the earth, and discusses questions such as what is at the center of the earth, why the sea is salty, how the atmosphere was created, and what the ocean floor looks like.
Explores the secrets of the earth, and discusses questions such as what is at the center of the earth, why the sea is salty, how the atmosphere was created, and what the ocean floor looks like.