13 hours ago
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ARTICLE AD BOX
Reaching the deepest parts of Earth is far more difficult than traveling through space. Humans have journeyed roughly 25 billion km beyond our planet, yet drilling beneath Earth's surface has only reached a depth of just over 12 km. This extreme limitation means scientists still know relatively little about what lies far below the crust.
That knowledge gap is especially important near the boundary between the mantle and the core. This region represents the mos...
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