A simple online search will bring up a number of paranormal experiences that people have witnessed all over the world. However, most people who have at least a little common sense find it hard to believe in tales of ghosts, mysterious houses, aliens, etc. The main question is: What kind of proof do people need to believe in something other-worldly? The answer is never straightforward in such situations. Here are a few stories that have spread all across the world and come under the umbrella of paranormal phenomena.