It's one of the great unanswered questions......are we alone or is there life elsewhere in the universe?
Well it's been a big day today for the many people who think aliens DO exist - as the Government released its files on reports of UFOs for the final time.
The files contain a letter from a child in Altrincham asking the Prime Minister if he believes in life beyond earth.
Our correspondent Andy Bonner's been looking at the files and talking to an expert.
More top news
Best of any sunshine in the south and east. Turning warm and humid with heavy rain for a time into the early part of Sunday
She was was left requiring hospital treatment after an attempted robbery in Chadderton.
Police are investigating a recording by Imam, Mustafa Graf, from Chorlton, who references ‘jihad’ and ‘mujahideen’.