Scientists Discover Subsurface Mega-Structures 100 Times Taller Than Everest and Billions of Years Old
A new deep-Earth analysis reveals colossal structures beneath Africa and the Pacific that may be older than complex life, and far more extreme than anyone imagined.
Everest Isn't Earth's Tallest Mountain Anymore: Scientists Uncover Hidden Mega-Structures 100X Taller and Billions of Years Old
Deep beneath the surface of the Earth, two continent-sized structures have long puzzled geologists. Known as large low-shear-velocity provinces, or LLSVPs, these massive blobs of dense material sit at the base of the mantle, one beneath Africa and the other beneath the Pacific Ocean. Now, a growing body of research using advanced seismic imaging has revealed that these formations are far more enormous and ancient than previously understood. Scientists estimate that some portions of these structures tower roughly 100 times higher than Mount Everest, reaching heights of up to 1,000 kilometers above the core-mantle boundary, and they may have been in place for billions of years, predating the emergence of complex life on Earth's surface.
The findings come from decades of seismic data analysis, most recently synthesized by researchers studying how earthquake waves slow down as they pass through these regions. The deceleration suggests the material is compositionally distinct from the surrounding mantle, potentially representing primordial remnants from Earth's earliest formation. Some scientists theorize the LLSVPs could be leftover material from the giant impact that created the Moon roughly 4.5 billion years ago, with dense iron-rich silicates from the impacting body sinking to the bottom of the mantle and accumulating into these towering mega-structures over deep geological time.
The implications of these discoveries extend well beyond geology. Researchers believe the LLSVPs may have played a critical role in shaping Earth's surface throughout its history, influencing the movement of tectonic plates, driving volcanic hotspots, and even contributing to the breakup of supercontinents. The African LLSVP, for instance, has been linked to the unusual topography of the African superswell, a broad region of elevated terrain across southern and eastern Africa. The Pacific structure similarly correlates with intense volcanic activity across the Pacific Ring of Fire and numerous oceanic hotspot chains, suggesting these deep-Earth features have been quietly orchestrating surface geology for eons.
Despite the excitement surrounding these findings, much remains unknown. Scientists still debate whether the LLSVPs are thermally or compositionally distinct from the rest of the mantle, whether they are stable or slowly evolving, and exactly how old they truly are. New seismic tools and computational models are expected to sharpen the picture in coming years, but for now, the discovery has fundamentally reframed how researchers think about Earth's interior. The tallest structures on our planet, it turns out, are not the snow-capped peaks we can see but the hidden giants buried thousands of kilometers beneath our feet.