Ok so I have a friend who is obsessed with ET's and UFO's, he constantly talks about it, I told him I'm willing to believe they exist if he gave me some irrefutable proof, he's researched them probably for months and yet gave me nothing concrete or anything that wasn't agenda driven

I'm pretty open minded and definitely believe there's something out there, however I'm not convinced it's little green men with big heads and eyes.

*** TLDR Give me some proof of aliens ***