Photo of the Day #742: Dinosaur National Monument

The interstellar comet 3I/Atlas reached its closest point to the sun. Here's how to follow the rest of its journey away from our solar system.

Driving a spacecraft around a planet isn’t anything like driving on a planet. A physicist explains orbital navigation.

“Anomalous” heat flow, which at first appears to violate the second law of thermodynamics, gives physicists a way to detect quantum entanglement without destroying it.

A Trump administration pilot program aims for three nuclear startups to reach a key milestone by July 4, 2026. Valar Atomics says it’s the first to do so—but it had some help.

The storm, which is set to make landfall in Jamaica on Tuesday, has stunned meteorologists with its intensity and the speed at which it built.

Unusually warm ocean temperatures fueled one of the worst hurricanes on record. New research finds climate change increased the storm’s likelihood.

The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, uses number theory to explain quantum fractals.

The same pulling force that causes “tears” in a glass of wine also shapes embryos. It’s another example of how genes exploit mechanical forces for growth and development.

By shifting water to a higher elevation, the giant Three Gorges Dam caused the Earth to spin more slowly.

Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

What sneaky invisible forces enable these instruments to locate buried treasure?

An observatory detected the first radio signal from the interstellar object 3I/Atlas. Here’s what it means.