What are the facts behind paranormal happenings and ghosts?

Hi everyone, I wanted to know if anyone has ever seen any ghost or something like this. As all of us have always heard that ghost does exist but no one has proved their existence. There is no permissible proof that the ghost exist. I am intense to know about the fact of ghosts. What info do you people have on this?

Yes, it is absolutely true that the existence of ghosts has not been proved yet but still I have retrieved some information about ghosts from an online service which has videos on paranormal and ghost happenings and are a real treat to watch. There you have videos brought by different people as there is an upload facility so that you can share your videos. It is indeed a good place to be surfing when you have interest in paranormal and ghost incidents.