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 ...

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 ...

Human activity brings with it alien species and creates excellent conditions that allow them to become established in an otherwise barren Arctic landscape. The slope below the old barn and farm ...