From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Nobody was expecting very strong energy dissipation inside Titan,” says Flavio Petricca, a postdoctoral fellow at NASA’s Jet ...

In 2025, astronomers sharpened their view of the planetary system around Proxima Centauri — the sun's closest stellar ...

The first unmistakable signal from another intelligence would rank alongside fire and writing in the story of our species, ...

Interstellar object 3I/ATLAS is confirmed as a natural comet from beyond our solar system, posing no threat to Earth despite ...

Interstellar object 3I/ATLAS, the third such visitor ever observed, is exhibiting unusual energy and chemical behavior as it ...

Harvard physicist Avi Loeb challenges NASA, suggesting the iron-rich composition of interstellar object 3I/ATLAS indicates ...

One estimate by an engineer in SCU forecasts that given 300 "actual" UAP sightings per year — and assuming random ...

Tantalising signs of past microbial life showed up on Mars this year, but to truly know whether they contain the answer to ...

The continent’s ice is melting and raising sea levels worldwide. Our journalists will be sending regular dispatches as they ...

New details of deliberations show how aides with overlapping agendas drove the United States toward a militarized ...