For more than a century, popular culture has trained us to picture extraterrestrials as bug-eyed, bipedal “little green men” ...

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.

Columbia University professor David Kipping predicts humanity's first alien encounter will be with a rare, "loud" ...

Aliens might be transmitting communications signals to each other across exoplanets, some astronomers think. Since these signals are likely sent as narrowband radio waves, we may now have a way to ...