A Very Merry (Merc) Christmas!

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.

A Turning Point USA official inaccurately claimed a high school's math department wore Halloween costumes that mocked Charlie Kirk. Those teachers are now facing a flood of online attacks and death threats.

A federal contracting database lists an ICE payment for $61,218 with the payment code for “guided missile warheads and explosive components.” But it appears ICE simply entered the wrong code.

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

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

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.

A new US law enforcement initiative is aimed at crypto fraudsters targeting Americans—and now seeks to seize infrastructure it claims is crucial to notorious scam compounds.

“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.”

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

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.

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