Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself?

The first unmistakable sign of extraterrestrial technology may not arrive as a calm greeting. It may look more like a flare.

Evidence of alien life or cosmic pyramid scheme? A documentary filmmaker sparked a discussion of advanced Martian ...

Advanced alien civilizations may communicate via a series of flashing lights, similar to how fireflies do, a new paper hints. This would potentially make extraterrestrials much harder to spot if we ...

For four decades, many SETI experiments have focused on finding sharp spikes in frequency but the new study says signals may not stay narrow as they travel away from their home system.

Sohrab Rahvar and Shahin Rouhani’s recent paper, “Constraining the Lifespan of Intelligent Technological Civilization in the Galaxy,” lays it out bluntly: Advanced civilizations last roughly 5,000 ...

Add Yahoo as a preferred source to see more of our stories on Google. In his classic science fiction novel Contact, Carl Sagan remarked, “The universe is a pretty big place. If it's just us, seems ...

If so, why haven’t they said hello? The humble residents of this pale blue dot have been on a quest to find an alien civilisation for more than a century. First, it was the “canals” of Mars. Then ...

Solar winds near aliens’ homes – and ours – might be blowing away signs of alien technosignatures by broadening signals The SETI Institute, the nonprofit that conducts a search for extraterrestrial ...

Aliens: "Sorry, you're cutting out!" The post Something May Be Scrambling Alien Messages, NASA-Funded Research Finds appeared ...