For decades, the deepest part of Earth’s mantle has remained largely out of view, hidden beneath thousands of kilometers of rock and extreme conditions. Now, new data is beginning to expose patterns that scientists were never able to observe at this scale before. A new seismic study has uncovered large-scale deformation patterns nearly 1,800 miles beneath Earth’s surface. The findings point to a strong link between these movements and ancient tectonic slabs that have sunk deep into the planet over millions of... [3195 chars]