The annotated artist's concept illustrates the new view of the Milky Way. The galaxy's two major arms (Scutum-Centaurus and ...

Scientists have been searching for radio signals from hypothetical alien civilizations using radio telescopes for decades.

The expansiveness of the universe could make interstellar communication difficult, even for the most advanced civilizations.

Complex, intelligent life in the galaxy appears vanishingly rare, with the nearest possible civilization perhaps 33,000 light ...

Is anybody out there? Probably. Most stars have planets; we've discovered more than 6,000 exoplanets thus far, and the most ...

Even with modest assumptions, the Drake Equation often suggests the galaxy should be chock full of extraterrestrial neighbors ...

An astrophysicist has proposed an intriguing explanation for why humanity has never made contact with an extraterrestrial ...

The idea was that as an alien civilization advances, its technology becomes too sophisticated for us to detect. We could ...

Harvard's Avi Loeb gives a '40% chance' that interstellar object 3I/ATLAS is alien technology, citing 'anomalies' like pure nickel gas, a sunward jet, and a 'finely-tuned' trajectory.

Brian Lacki has released a set of three prepublication studies attempting to rationalize and measure the odds of a ...

Avi Loeb suggested that if 3I/ATLAS is a spacecraft, it may use its proximity to the Sun's powerful gravitational pull while ...