The SETI Institute recently began searching for signs of advanced extraterrestrial civilizations in distant galaxies outside our own. The research comes at a time when the notion that strange crafts ...

The majority of Americans believe there there is extraterrestrial life. Aliens might marvel at earth's natural beauty but wonder why we are not protecting it.

The strongest yet indication of extraterrestrial life – in the form of organically produced chemicals, not an alien civilization – may have been found on a giant exoplanet 124 light-years from Earth, ...

Have extraterrestrials enjoyed trips to Earth for eons? Did long-ago aliens venture to our planet lugging technology that shaped humans' religious beliefs and technological advances? Ancient astronaut ...