Earth surface is covered with rigid plates that move, crash into each other and dive into the planet's interior. But when did this process begin?

The mystery of what kick-started the motion of our earth's massive tectonic plates across its surface has been explained by researchers at the University of Sydney.

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, and ...

Nature?s method ofachieving this on the Earth appears to be plate tectonics. Plate tectonics - essential for life? Itis an idea growing in popularity among planetary scientists.