A strange purple object aboard the ISS sparked alien fears online, but NASA revealed it was a potato experiment. It shows how ...

A NASA astronaut recently sent the internet into a frenzy when he posted an alien-looking photo on social media. The photo ...

A retired 'UFO general' and a NASA-linked scientist have both vanished in the US, fuelling clashes over whether the case ...

A bizarre floating growth on the International Space Station has caused hilarious online comments.

Did NASA discover city lights on an alien planet? This video explores the implications and details of the findings that ...

Add Yahoo as a preferred source to see more of our stories on Google. A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible ...

Well, one NASA scientist certainly seems to think there's a chance. Ivo Busko, a retired NASA developer who worked at the ...

A former NASA developer has analyzed 1950 photographic plates showing nine unexplained objects in Earth's orbit, years before ...

If aliens are out there, why haven’t we heard from them? That’s the question at the center of Pop Mech’s new story, “Aliens Probably Exist—But They’re Staying Silent For a Reason, NASA Scientist ...

A strange, tentacled object that went viral online was revealed to be a space-grown purple potato. Astronaut Don Pettit ...

NASA officials discussed the results of an independent team’s findings released Thursday after delving into how to unlock the secrets of Unidentified Anomalous Phenomena, more commonly known as UFOs.

What would alien life from another planet be like? But we rarely ask the opposite: What would they think of us?