As space agencies prepare for human missions to the moon and Mars, scientists need to understand how the absence of gravity ...

On Thursday the U.S. president ordered the release of federal files related to UFOs and aliens, although no evidence of extraterrestrials visiting Earth is known to exist ...

Astrobiologists say we could find evidence of microbial life within the next 10–20 years. What does that mean? Where are we ...

Among the most persistent claims is that extraterrestrials assisted in the construction of ancient civilizations.

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

For more than 60 years, scientists have been scanning the skies for signs of intelligent life beyond Earth. Using powerful telescopes, they have searched for unusual radio signals, brief laser flashes ...

YouGov, a research and analytics firm, found last year that most Americans believe in aliens. Its poll results showed in November that 56% of adults, including 61% of Democrats and 46% of Republicans, ...

For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp ...

Barack Obama sparked a debate after seeming to confirm aliens are “real” on a podcast. The comment came as Congress continues ...

Former U.S. President Barack Obama has clarified comments he made about alien life on a podcast over the weekend ...