Earth is spinning faster, leading timekeepers to consider an unprecedented move
The planet’s natural rhythm is changing—and timekeepers around the world are watching closely. Earth is rotating faster than it used to, prompting scientists and international timekeeping authorities to consider an adjustment that has never been made before: subtracting a second from Coordinated Universal Time (UTC).This possible measure, referred to as a "negative leap second," would be unprecedented in human history. Although leap seconds have been inserted to align clocks with Earth's somewhat inconsistent rotation, removing one poses intricate issues for technology, communications, and worldwide systems that depend on exact timing.For decades, timekeeping has accounted for the Earth’s variable rotation by…