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Earth rotation speed

Earth Core Gravitational Forces Drive Shifting Length of Days

September 25, 2026 by Sophie Lin - Technology Editor

Small variations in Earth’s rotation speed are shortening days by mere milliseconds, driven by a hidden tug-of-war beneath our feet.

Categories Technology Tags Earth rotation speed, Earth's metallic core, gravitational forces, length of day, Mathieu Dumberry, Nature journal, University of Alberta Leave a comment

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