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.

Aliens exist - they just haven't visited Earth, NASA veteran Dr Gentry Lee has claimed.

Documents might help scientists shed light on unexplained phenomena and government secrets, experts said.

Recent remarks by President Trump about releasing UFO files have reignited interest in Area 51, a secretive US military site ...

The most beloved beings from strange new worlds.

Prediction markets – which allow users to bet on the outcome of almost anything – are coming to the UK, bringing with them ...

Our fascination with the cosmos has led to many great UFO movies being produced, some of which never got the audience they ...

If you believe the Earth is flat or that aliens control the government then you're probably a control freak, according to a new study.

CBS Photo Archive // Getty Images Rod Serling's iconic, critically acclaimed "The Twilight Zone" used fantasy, thriller and ...