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.

Humans discovered the curvature and rotation of the Earth thousands of years ago, dating back to ancient Greece. Since then, scientists have only discovered more evidence to prove this is true ...

Earth is spinning faster than ever, and the result is a shortening of the length of our days. Since 2020, each year has brought records for the shortest day ever, with Earth’s spin accelerating ...

Life & Culture Earth’s rotation will speed up for 3 days this summer. Here’s what that means Published: Jul. 09, 2025, 4:09 p.m.

July 9 was predicted to have a shorter "length of day" than usual due to an increase in Earth's rotation speed. See which other days will be shorter ...

For the first time in history, world timekeepers may have to consider subtracting a second from our clocks because the planet is rotating faster.

Planetary Tailspin The Earth's rotation is about to accelerate significantly. According to scientists, July 9, July 22, and August 5 of this year will be some of the shortest days in years as a ...

The "flat and non-rotating" terminology found in NASA papers is a common technique in aerospace engineering to generalize mathematic equations.

Planet Earth will spin a little faster on three separate days this summer, starting on July 9. This will technically result in shorter days, but the change will be so minuscule you won’t even ...

For the first time in history, world timekeepers may have to consider subtracting a second from our clocks because the planet is rotating faster.