The central sphere or core region of Earth, including the inner and outer core.
From Latin 'centrum' (center) + Greek 'sphaira' (sphere). The term emerged in geology during the 19th century to describe Earth's innermost layers distinct from the mantle and crust.
Scientists discovered that Earth's centrosphere is incredibly hot—hotter than the surface of the sun—yet it stays solid because of the crushing pressure from all the rock above it, creating one of nature's most extreme environments.
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