UFO means "unidentified flying object." That's all it means, just "unidentified." It doesn't mean it's extraterrestrial, being controlled by some other entity, or from some Twilight Zone "other dimension of space and time." There's something in the human mind that doesn't like unanswered questions. So we try to make up scenarios to explain things that we have no answers for.
I agree with Gardenlover. If my space ship was tuned into the news stations from earth, you can bet I'd lock my doors when flying by this planet!
I agree with Gardenlover. If my space ship was tuned into the news stations from earth, you can bet I'd lock my doors when flying by this planet!