Seismic imaging has revealed two colossal regions deep within Earth’s mantle that could reshape our understanding of the planet’s composition and history. These continent-sized anomalies, known as large low-velocity provinces (LLVPs), lie near the core, beneath Africa and the Pacific Ocean.
LLVPs are notable for their unusual makeup and their ability to slow seismic waves, making them mysterious features of Earth’s interior.
Their origins have long baffled geologists, but a groundbreaking study has introduced a bold hypothesis: these subterranean giants might be remnants of Theia, a lost planet that collided with Earth billions of years ago.
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