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

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

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' ...

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 ...

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

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

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 ...

A “strong signal” detected by a radio telescope in Russia that is scanning the heavens for signs of extraterrestrial life has stirred interest among the scientific community. “No one is claiming that ...

A group of Chinese scientists is diving deep into the cosmos in search of alien radio signals from the TRAPPIST-1 star system, which might house planets that could support life. This is no small feat, ...

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 ...