Scientists reported that in 2020, Earth had begun to rotate faster, after consistently turning slower than 86,400 seconds per day in the decades before. On June 29, 2022, Earth's rotation was completed in 1.59 milliseconds under 24 hours, setting a new record. Due to that trend, engineers worldwide are discussing a "negative leap second" and other possible timekeeping measures.

This increase in speed is thought to be due to various factors, including the complex motion

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