Earth's mantle is a restless, enigmatic engine that powers volcanism, recycles crust, and regulates the long-term evolution of the planet. But one of its most elusive characteristics—the redox state, ...

Giant blobs that lurk near Earth's core are much older than scientists thought, new seismic data reveals. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

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. Lavas ...