About 1,800 miles beneath the surface, Earth's internal structure changes abruptly where the solid rock of the mantle meets the swirling molten iron of the outer core. But the boundary between the ...

Seismic waves generated in Earth's interior provide images that help us to better understand the pattern of mantle convection that drives plate motions. You have full access to this article via your ...

In Jules Verne's classic 1864 novel "Journey to the Center of the Earth," adventurers descend through an Icelandic volcano into a vast underground world populated by prehistoric creatures as they ...