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 ...

It arrived in a plain brown package by registered mail ... How do diamonds travel to the surface of the Earth? The diamonds that we see at the surface are ones then that are brought to the ...

The movement of tectonic plates shapes the rocky features of Earth's surface. Plates' convergence ... as well as in the East European Plain. This pattern of swells and basins may control—to ...

The world still holds mysteries, even the size of continents. And sometimes, the greatest discoveries are the ones we were never quite sure existed.