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Leap seconds have helped keep clocks synchronized with Earth’s rotation, but their time is now over – here’s why

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300 glaciers have disappeared from the American West since the mid‑20th century – the survivors have a few things in common

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Leap seconds have helped keep clocks synchronized with Earth’s rotation, but their time is now over – here’s why

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Math and the Sciences

Leap seconds have helped keep clocks synchronized with Earth’s rotation, but their time is now over – here’s why

Vahe Peroomian, USC Dornsife College of Letters, Arts and Sciences You’re probably used to the month of February…

byVahe Peroomian

October 21, 2026