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

An ocean world that's teeming with microbes — and who knows what other kinds of life — is currently the best explanation for some chemical signatures that the James Webb Space Telescope has spotted in ...

NASA's hunt for alien life may be undermined by its own instruments, according to a group of leading astrobiologists who warn that current tools and mission designs are likely missing subtle, but ...

New SETI protocols outline how scientists should verify, share, and respond to potential evidence of alien intelligence in ...