"Earth's Changing Spin: Implications for Timekeeping Amid Climate Change"

Earth's rotation is speeding up, potentially requiring a "negative leap second" to be subtracted from world clocks around 2029, due to the planet rotating faster than before. This unprecedented situation is caused by the Earth's hot liquid core and melting ice at the poles. The discrepancy between atomic and astronomical time has led to the need for leap seconds, but the prospect of subtracting a second poses challenges for computer systems. While some experts believe a negative leap second will be necessary, others argue that long-term predictions about Earth's rotation are uncertain.