A recent theory proposed by a NASA scientist suggests that extraterrestrial civilizations may not possess the wildly advanced ...

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

"Although ETIs might be rare, there is only one way to really find out, and that is by searching for it." A new study argues that conditions necessary for intelligent extraterrestrial life may be far ...

Dyson swarms—theoretical arrangements of satellites orbiting a star to harness its energy—may seem like they could be eternal once constructed, but they are still at the mercy of gravity. A new ...

There’s the infamous zoo hypothesis, which supposes that advanced aliens know about our planet but stay away to let us evolve ...

Technosignatures are theoretical signs of technologically advanced alien civilizations, but so far, none of those civilizations have phoned home. Researchers from the Search for ExtraTerrestrial ...

While global fascination with UFOs and alien life continues to surge, famed physicist Stephen Hawking long urged caution, arguing that humanity's eagerness to make contact with extraterrestrial ...