Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures?

A provocative theory circulating among artificial intelligence researchers suggests that once machines achieve human-level intelligence and beyond, they might create something entirely unexpected: a ...

Are aliens real? The question has animated conspiracy theories for decades and enthralled at least one former president of the United States. In a recent interview, Barack Obama became the first ...

Add Yahoo as a preferred source to see more of our stories on Google. Planetary alignments may guide the search for extraterrestrial intelligence, boosting chances of detecting alien technosignatures ...

Bring up aliens and a lot of people will scoff. But not everyone is laughing. Around the turn of the century, 3.8 million people banded together in a real-time search for aliens -- with screensavers.

A recent theory proposed by a NASA scientist suggests that extraterrestrial civilizations may not possess the wildly advanced technology that many UFO enthusiasts expect. This perspective, which ...

A new study suggests a novel approach in the long-running scientific endeavor to find intelligent life beyond Earth. Instead of casting a wide, speculative net across the cosmos, researchers from Penn ...

The latest novel by Adrian Tchaikovsky, Shroud, examines the question of whether, faced with an alien intelligence, we would actually perceive it as intelligent. That and whether the aliens would ...

The problem with recognition of alien intelligence raised in your review of Adrian Tchaikovsky’s book Shroud was also tackled in a short sci-fi story from the 1970s, in which some humans get stuck on ...

That is where Anonymous Chicken keeps tripping up. A species that uses touch or echolocation as its primary sense and has manipulative appendages could potentially develop a technological civilization ...