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

These could be quietly ignored until 1947, when postwar alien fever was sparked in Roswell, New Mexico. Metal and rubber ...

The moment of first contact with extraterrestrials is a staple of science fiction. It usually involves a frantic scientist ...

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 ...

3I/ATLAS, an interstellar object whose unusual motion has ignited debate over possible artificial origins Astronomers are baffled by 3I/ATLAS, a newly discovered interstellar object that appears to be ...