A quick look at how long Earth takes to fully rotate on its axis.

We know Earth’s rotation on a cosmic scale, but seeing it close up requires quantum mechanics. Interferometry is the use of light waves, sound, etc., to identify changes in matter or motion. New ...

Human engineering appears to have moved the planet, literally. According to new research published this month, the global boom in dam construction over the past two centuries has caused measurable ...

Last Word is New Scientist’s long-running series in which readers give scientific answers to each other’s questions, ranging from the minutiae of everyday life to absurd astronomical hypotheticals. To ...

The answer, obviously, is really, really fast. Here, Universe Today‘s Fraser Cain tells us exactly how fast, and gives us answers to a few other things you may have wondered about before. For instance ...

Add Yahoo as a preferred source to see more of our stories on Google. When the moon was made, Earth's day may have been shorter than 10 hours. | Credit: Image Source via Getty Images Once every 24 ...

Here’s a reminder: We’re not the center of the Universe. As species, as members of this planet, this solar system or even the Milky Way galaxy. We are just a speck twisting in interstellar dust. Which ...

Last Word is New Scientist’s long-running series in which readers give scientific answers to each other’s questions, ranging from the minutiae of everyday life to absurd astronomical hypotheticals. To ...

Russell has a PhD in the history of medicine, violence, and colonialism. His research has explored topics including ethics, science governance, and medical involvement in violent contexts. Russell has ...

Think humans play a relatively small role in how Earth moves in space? It turns out we’re changing how our very planet rotates — and it’s affecting the length of our days. For billions of years, Earth ...

Earth will complete a rotation 1.33 milliseconds earlier than usual on Tuesday, August 5. That makes it one of the shortest days of 2025 at 86,399.99867 seconds long. How that happens, and how we can ...