There's a lot we don't know about our home planet and solar system. The post Can You Answer These Basic Questions About Earth ...

Plate tectonics is the theory that Earth's outer layer is made up of plates, which have moved throughout Earth's history. The theory explains the how and why behind mountains, volcanoes ...

This is the basic principle that allows electric motors and generators to operate. In the Earth (see image below right), the liquid metal that makes up the outer core passes through a magnetic ...