Add Yahoo as a preferred source to see more of our stories on Google. At a time of mounting public interest in UFOs, the SETI Institute is looking not to Earth to find signs of advanced alien ...

A search of more than 1,300 galaxies for extraterrestrial signals has helped to constrain expectations as to how many communicating, technological civilizations may exist beyond Earth. Conducted with ...

If so, why haven’t they said hello? The humble residents of this pale blue dot have been on a quest to find an alien civilisation for more than a century. First, it was the “canals” of Mars. Then ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Astronomers have begun a first-of-its-kind search for signs ...

Whether alien life exists in the universe may be one of science's most important questions. Now, a leading British scientist says she has a definitive answer. Dame Maggie Aderin-Pocock, a space ...

On Earth, we're constantly detecting signals from deep space. Many of these radio waves and other forms of electro–magnetic radiation can be attributed to natural phenomena such as pulsars, colliding ...

In context: Radio waves from distant galaxies are too faint to provide meaningful data for potential space observations. However, a sufficiently advanced alien civilization could harness energy in ...