Great Space Photo of the Pyramids

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.

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

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

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.

“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.

The only craft docked at Tiangong space station has been damaged and “does not meet the release conditions for a safe manned return.”

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.

Which film camera should you get? Which films are the best? We demystify the world of analog photography to help you get started.

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

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

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

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.