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 ...

Human intelligence wasn’t a cosmic evolutionary fluke, some scientists say. The case against cosmic loneliness is growing.

Lara Trump recently claimed the president already has a speech prepared on UFOs.

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 ...

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 ...

But the real truth is that alien life on other planets could be even stranger than floating balloons or amorphous organisms ...

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 ...