Could the first confirmed signal from an extraterrestrial source be less a hello than a goodbye? Astrophysicist David Kipping ...

Scientists suggest the first alien signal we detect could be a desperate cry for help from a fading civilization.

A NASA astrophysicist argues alien civilizations may be out there—but too quiet or distant for us to detect. Here’s the new ...

In the many decades of NASA exploration, there has only been one detection that got on that scale. It was collected by the ...

A NASA-backed study reveals that alien civilizations could detect human signals sent to spacecraft. Radio transmissions aimed at Mars rovers and orbiters aren't fully contained, creating a 'spillover' ...

One of Britain’s most prominent space scientists believes humanity may finally get an answer to one of its oldest questions ...

Historically, many scientists and society have been fascinated by the prospect of making contact with extraterrestrial ...

The Deep Space Network (DSN) is just the sort of tool aliens could one-day detect, transmitting from Earth. Credit: NASA/JPL What if the first signal ever detected from an alien lifeform wasn't a ...

Astronomers thought they had seen the "first hints of life on an alien world" this year, but they disappeared under closer ...

While alien hunting is often associated with tinfoil hats and flying saucers, the Search for Extraterrestrial Intelligence ...

On August 15, 1977, the Big Ear Radio Telescope in Delaware, Ohio, received the most powerful signal it would ever detect during its decades of observations. The signal lasted just 72 seconds, but ...

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 ...