Scientists now understand why seismic waves speed up near Earth's core. Extreme pressure and temperature cause solid mantle rock to flow slowly, aligning mineral crystals. This anisotropic structure ...

A massive, iron-rich structure sitting at the base of Earth’s mantle beneath the Hawaiian Islands may be doing more than ...

A stratum of molten rock located deep within certain rocky planets may be exerting influence beyond merely shaping their internal structures. Recent research suggests that these concealed magma oceans ...

Add Yahoo as a preferred source to see more of our stories on Google. New experiments show Earth’s lower mantle trapped far more early water than thought, reshaping views of habitability. (CREDIT: ...

Deep beneath your feet, far beyond where any drill can reach, something strange is hiding. Two continent-sized blobs of rock sit just above Earth’s core, hot, dense and stubbornly different from ...

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 ...

A volcano in southwestern Iceland erupted early Wednesday in a spectacular show of spewing lava and glowing magma, marking the 12th eruption on the Reykjanes Peninsula since 2021. The Sundhnukur ...

An ice-clad behemoth among Alaska’s Aleutian Range mountains is sharing secrets about what makes some volcanoes tick — namely, ones that show little sign of erupting before they blow. In a study ...

Planet Mercury is scorched and easy to overlook, yet the innermost planet keeps tossing cosmic curveballs. Now researchers suggest an even wilder twist: a layer of diamond roughly 10 miles thick may ...

London — A volcano began erupting in southwestern Iceland on Tuesday, just hours after authorities evacuated a nearby community and a geothermal spa, one of Iceland’s biggest tourist attractions.