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Earth’s spin has slowed. But we still may need a negative leap second. – Livescience.com

Earth’s rotation has settled down after speeding up in 2020.

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After speeding up during 2020, Earth’s rotation has settled down. But timekeepers say we still may need a “negative leap second” in the next decade. 
On average, each Earth
day contains 86,400 seconds. But Earth’s rotation isn’t perfect; it varies slightly…

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