Donald Trump’s pledge to release official files relating to UFOs has intrigued conspiracy theorists who suspect the US government has hidden evidence of alien activity on Earth.

We’ve discovered thousands of exoplanets — but not a single confirmed exomoon. That doesn’t mean they aren’t out there. In ...

Questions about what the federal government may know about extraterrestrial life in the cosmos — or possibly even here on ...

Using NASA's Transiting Exoplanet Survey Satellite (TESS), an international team of astronomers has discovered a new ...

One of the most photographed features in Mystery Cave is the Turquoise Pool, a body of water so clear and so perfectly ...

A SCIENTIST known for discovering water on a distant planet has been mysteriously shot dead on his front porch. Carl ...

What if we were the aliens? In a great 1991 episode of 'Star Trek: The Next Generation,' the notion of aliens among us was ...

With Area 51 ruled out by President Obama, where might aliens really be hiding? Scientists have now revealed the best candidates.

Science fiction movies are already meant to leave you thinking what the ending meant, but these five may have left you thinking about too much.

The Science: Europa has been considered as a top contender for alien life for even longer than Enceladus, thanks to its massive under-ice liquid water oceans. It also displays water vapor plumes ...

Scientists have discovered something that they previously thought wasn’t possible – an ‘inside out’ star system. When you ...