The conversation between human and AI assistant.
Do aliens really exist and do they live on Earth with us?
Have there been any sightings of UFOs that have been confirmed to be real?
While there have been many sightings of UFOs, there is no concrete evidence to suggest that any of them are extraterrestrial in origin. It's important to remember that "UFO" simply refers to an unidentified flying object, not necessarily an alien spacecraft.