A buried wedge of stiff mantle rock might be the reason why the Himalayas and the Tibetan Plateau have stayed so high for ...

For the first time, scientists have tracked volcanic tremors beneath Oldoinyo Lengai, a bizarre volcano in northern Tanzania.

Hidden inside Vietnam’s Phong Nha-Ke Bang National Park is Son Doong, the largest cave on Earth. It’s so vast that a Boeing ...

South African diamonds have revealed nickel-rich metallic inclusions, offering the first direct evidence of reactions predicted to occur deep in Earth’s mantle. The study shows how oxidized melts ...

A team of geophysicists say that an enormous mass shifted deep beneath the Earth’s surface 18 years ago. As detailed in a paper published in the journal Geophysical Research Letters last month, a team ...

A giant dent in Earth's magnetic field is continuing to expand, according to the latest data from a trio of satellites monitoring our world.

Earth's core cannot be made just of iron — it also appears to contain carbon. And our research suggests it may contain a bit of oxygen and possibly silicon as well. The iron-rich core at the centre of ...

Last Word is New Scientist’s long-running series in which readers give scientific answers to each other’s questions, ranging from the minutiae of everyday life to absurd astronomical hypotheticals. To ...