What do you guys believe about the UFO phenomenon?

In my view, these things are nuts and bolts craft from other star systems. The idea that we are alone in the universe is ridiculous to me. I’m interested In what you folks think… space ships from elsewhere in the cosmos, inter dimensional craft of some type, non existent, just whatever? And UFO just means anything in the sky that is not ID’d, yeah I get that. But I use the term in a Marvin the Martian sense, humor me.