Deep within Earth’s mantle lie two enormous regions, often referred to as "islands," which are the size of continents.

Two enormous structures that sit at the border between the Earth’s mantle and its core have puzzled scientists for decades, defying reigning theories of how our planet came to be. In a new study ...

One of the strangest mysteries about our Earth is the presence of two dense, giant blobs inexplicably clustered above the planet's core. Now, new models might reveal where they have come from, and ...

Scientists now believe vast water reserves are hidden nearly 400 miles beneath Earth's surface, locked within rock. Lab experiments, earthquake data, and rare deep-formed diamonds suggest this 'wet' ...

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 ...

Scientists at Stanford have unveiled the first-ever global map of rare earthquakes that rumble deep within Earth’s mantle rather than its crust. Long debated and notoriously difficult to confirm, ...