Add Yahoo as a preferred source to see more of our stories on Google. Donald Trump's pledge to release official files relating to UFOs has intrigued conspiracy theorists who suspect the US government ...

A NASA image from Mars has reignited an old question online: are some of the strange patterns on the Red Planet really signs of life or movement there NASA/nasa.gov A NASA image from Mars has ...

The White House has lifted the lid on the shock extent of an "alien invasion" which has blighted US soil for the past six decades. On a newly-created website, the Trump administration has put out ...