Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

Humanity has already sent five spacecraft on trajectories that will eventually carry them beyond the Solar System, ...

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal ...

Even at this early stage in our spacefaring age, humanity has already begun sending probes that will eventually reach other ...

Grain-sized remnants of alien technology may get caught in solar wind and land on plants and moons close to us ...

The SETI Institute is the latest to confirm what scientists have long suspected: the interstellar 3I/ATLAS comet is not an ...

Is the rest of the cosmos a pristine environment awaiting the arrival of humanity’s “post-human” descendants? Or is advanced ...

Here’s what you’ll learn when you read this story: Every time an interstellar object comes whizzing into our Solar System, it brings with it a certain intrigue. Where is it from? How did it form?

In September, NASA announced the discovery of a possible sign of life, known as a potential biosignature, on Mars. The Perseverance rover, which has been exploring a dried-up lakebed for years, found ...

The United States government’s recent release of hundreds of previously classified Unidentified Anomalous Phenomena (UAPs) ...