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.
Contains miscellaneous facts about planet Earth such as how far it takes to get to the center of Earth and how much of the world's oceans remain unexplored.
Explores the secrets of the Earth, answering questions about what lies beneath the Earth's crust, why sea water is salty, what the ocean floor looks like, why Africa is splitting apart, and other topics.
Explores the secrets of the Earth, answering such questions as what is at the center of the Earth? Why is sea water salty? How was our atmophere created? What does the ocean floor look like?.