A strange shift in Earth's rotation is making our days milliseconds shorter — and scientists are racing to understand why.

On July 9, 2025, scientists at the International Earth Rotation and Reference Systems Service (IERS) reported that the Earth ...

While the Earth’s rotation changes over cosmic timescales, it also fluctuates on daily ones. We all know that a day lasts 24 hours, or 86,400 seconds, but that’s not perfectly accurate.

The rotation around the Earth's access and the subsequent Coriolis forces cause these differences to occur. The post claims the fact that this motion can't be felt by humans is evidence that the ...

On these days the Earth will be measurably—and, so far, unaccountably— accelerating its rotation, shaving from 1.3 to 1.5 milliseconds off of the usual 24 hours the typical day gets.

July 10 was the shortest day of the year so far, lasting 1.36 milliseconds less than 24 hours, according to data from the International Earth Rotation and Reference Systems Service and the US ...

A scientist has warned that Earth's rotation is unexpectedly accelerating, leading to the shortest day in history. Graham Jones, an astrophysicist, predicted this could occur in this summer.

A new study confirms that Earth's inner core has been rotating more slowly than usual since 2010. This mysterious "backtracking" could also end up slightly altering the planet's overall rotation ...

For a while, the scientists reported, the core’s rotation matched Earth’s spin. Then it slowed even more, until the core was moving backward relative to the fluid layers around it.

A Dec. 5 Instagram post (direct link, archive link) shows a TikTok in which a man reads and shows screenshots from various NASA reports that reference a "flat, non-rotating earth" model.

The asteroid will rotate Earth from Sept. 29 to Nov. 25. After about two months in our orbit, 2024 PT5 will be pulled toward the sun and continue traveling around the solar system.