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

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 ...

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 ...

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 team of scientists has detected a colossal geological anomaly, a massive and mysterious change that took place nearly 2,900 kilometers deep, right at the boundary between the Earth’s mantle and the ...

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 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 ...

A plume of hot rocks that burst forth from the Earth's mantle millions of years ago helped forge a land bridge that connected Asia and Africa for the first time, allowing land animals such as the ...

Most of this chaos likely unfolded in Mars’s first 100 million years,” said Dr. Constantinos Charalambous of Imperial College London. The mayhem he speaks of is not figurative but real gigantic, ...