A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

Researchers propose turning a future NASA moon base into a quarantine station that would screen space samples before they ever reach Earth.

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

We may be able to find evidence of advanced alien civilizations in pulverized traces of their technology. Oxford astrophysicist Brian Lacki argues in a new, yet-to-be-peer-reviewed paper that, instead ...

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

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

A NASA‑linked study argues that alien probes could already be in our Solar System, but our surveys are still too crude to ...

Every second, hypervelocity collisions may be blasting tiny flecks of Earth into space. Some of those grains, small enough to ...

Our search for technosignatures—clear signs of advanced civilizations beyond Earth—takes many forms. Many are driven by the famous Drake equation, which attempts to estimate how many technological ...

“Disclosure” has become a cult word. It shouldn’t be, since all it means, technically, is to reveal something. But the new wave of alien conspiracy theorists have made “disclosure” into a teasingly ...

The 72 newly released files date from the 1940s to this year and do not appear to contain definitive proof of life beyond our planet.