UFOs and the like

It's been interesting to see how apparently UFOs sightings in China closed an airport this past week. I remember reading a Ripley's Believe it or Not! book at my cousins and how it had random tidbits about alien creatures being spotted in different parts of the world or other unusual happenings. It always made me wonder if other life forms are actually out there. Then that is perpetuated by such movies as "Alien," "Independence Day" and "Men in Black." Are there alien forms out there? I'm not sure. And whenever I see a strange light in the sky that is not a star or an airplane, I wonder "what if it's a UFO?" Then I think "nah...they probably don't want to land here."