I think there is life on other planets, but I believe the ufo sitings are crap (IMHO only, not trying to offend). I saw a show on discovery channel about WWII scientists. The show stated that Natzi scientist were doing a lot of work on ufo like aircraft. Also they wrote strange writing on there, but it was only there wierd Natzi writing

. So before the war ended, the US military were trying really hard to bring those scientists to them to help in aircraft stuff. They said it was called operation paperclip, and around the 50's they were working on a LOT of aircraft that was strange looking. One was flown into a city on accident and people thought it was ufo. So...
This may be a rational decision, but I believe the UFO conspiracies are an excuse so the military doesn't have to tell everyone about what they're doing. As I said before though, I think there is a good chance that there is life on other planets, probably even planets that used to long ago, but is now extinct.
Idk if any of you have read The Silmarillion by J.R.R. Tolien, but he wrote about the beginning of Middle Earth based off of beliefs of how this world was created.
Not trying to convince anyone of anything, but I'm telling you what I think...