Deep below Earth's surface lie two gigantic structures with mysterious origins. Now, seismologists have found new clues about their composition that could upend our understanding of the whole planet's ...

Earth's mantle is a restless, enigmatic engine that powers volcanism, recycles crust, and regulates the long-term evolution ...

Two recent studies used seismic data from NASA's retired InSight mission to shed light on what lies beneath Mars’ surface and what that means for the planet’s history ...

A team of scientists has detected a colossal geological anomaly, a massive and mysterious change that took place nearly 2,900 ...

A new study published in National Science Review reveals that the asthenosphere plays an active role, rather than being passively involved as previously expected, in modulating seafloor spreading at ...

The Earth’s oceans have risen and fallen over the millennia. But they have, on average, been relatively stable over billions of years. The balance of the deep water cycle—the exchange of water between ...

Lavas from hotspots—whether erupting in Hawaii, Samoa or Iceland—likely originate from a worldwide, uniform reservoir in Earth’s mantle, according to an evaluation of volcanic hotspots published today ...

A recent study investigating giant "island" structures near Earth's core has deepened the mystery surrounding them: As well as suggesting they are truly ancient structures, the research may alter what ...

A recent study reveals dynamic transformations in Earth's lower mantle, impacting both earthquakes and the magnetic field. GRACE satellites detected a gravitational anomaly in 2007, linked to a ...

A team of Japanese researchers hopes to drill through the Earth's crust and reach the mantle directly. This would be a major achievement; our efforts to reach the mantle to-date have not been ...