The history of astronomical discovery shows that many of the most detectable phenomena, especially detection firsts, are not ...

These findings suggest that the absence of past detections does not mean discovery is imminent. If extraterrestrial ...

The most consequential signal humanity ever detects from another civilization may not arrive as a calm introduction. It may ...

If advanced aliens lived on a planet within a few hundred to a thousand light years away from Earth, then vast numbers of their signals must already have crossed Earth without being noticed, a new ...

Humans have wondered for centuries whether we are alone in the universe — and a new study suggests that if alien ...

A new scientific framework suggests that even if signals or physical traces from alien civilizations reached Earth, detecting ...

A recent SETI Institute study suggests that space weather could blur and weaken extraterrestrial radio signals long before ...

What steps can be taken to identify why we haven’t received radio signals from an extraterrestrial intelligence, also called technosignatures? This is what a recent study published in The ...

Radar systems used by civilian airports and military operations may be unintentionally revealing our planet's existence to potential "extraterrestrial observers." This is the conclusion of a study ...

The search for extraterrestrial intelligence (SETI) has yet to detect alien technosignatures like radio waves, but the cosmos is vast, and there are plenty of places left to look. New research ...

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 ...