For decades, geophysicists have known that something unusual happens nearly 2,900 kilometres beneath our feet. Seismic waves from earthquakes suddenly speed up in a thin zone just above Earth’s core.

Billions of years ago, another planet smashed into Earth. An event of this epicness could have created our Moon. It also ...

Scientists may finally be closing in on the origins of two colossal, mysterious structures buried nearly 1,800 miles inside Earth—hidden formations that have puzzled researchers for decades. New ...

Gravity may seem constant, but it actually varies across the planet—and one of the strangest places is Antarctica, where gravity is slightly weaker than expected. Scientists have traced this “gravity ...

A view of the Earth’s interior around 1 billion years ago: Tangled magnetic field lines inside the core are linked with the Earth’s exterior magnetic field. (Scientifically correct image from a ...