Geologists from ETH Zurich and the California Institute of Technology, who are studying the Earth's interior using seismic waves, have discovered an intriguing phenomenon beneath the Pacific Ocean.

The finding also presents scientists with a new puzzle: the pieces are far away ... and create a new high-resolution model of the Earth's interior. The signs of submerged plates were found in ...

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

To learn why, where, and how earthquakes happen, you need to familiarize your students with the interior of the Earth and a model called plate tectonics. The engine behind the earthquake machine ...