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Why the Earth Is Spinning Faster
On July 10, 2025, Earth broke its own speed record by completing a full rotation 1.36 milliseconds faster than the usual 24 hours. This puzzling phenomenon has raised questions about our planet’s internal dynamics, the Moon’s gravitational effects, and whether we might soon need a negative leap second — something that has never been done before. Here’s what’s happening and why scientists are watching closely.
Jul 25, 20254 min read
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