UFOs are fact. By definition, a UFO is any flying object that is unidentified. The real question then, is what are UFOs?
The vast majority of UFO sightings have rational explanations. Experimental military aircraft are probably responsible for a large number of sightings, especially in the western US. Natural phenomena explain many more. Meteorites, planets, atmospheric reflections, and the classic "swamp gas" could explain many sightings. Other man made objects like balloons, airplanes, and hoaxes round out some common explanations for UFO sightings. Hypnotic suggestion casts doubt on witnesses who only remember their UFO sightings when under hypnosis.
But if 99.9% of all UFO sightings can be explained, the 0.1% left over still results in hundreds of unexplained cases. What could be responsible for all of these mysterious sightings, many of which involve face-to-face contact with "extra-terrestrials. "
One of the most compelling explanations that I have heard can be found in the book, "Lights in the Sky and Little Green Men," by Dr. Hugh Ross (www.reasons.org). Dr. Ross is a Ph. D. in Astronomy who also has degrees in physics. Dr. Ross' theory is that unexplained UFOs may be inter-dimensional travelers that we would be more likely to call angels and demons.
Dr. Ross begins with an analysis of the likelihood of life existing in other parts of the universe. The odds for life arising elsewhere are astronomically (pardon the pun) low. Even if life did arise elsewhere, the odds that they could overcome the difficulties of interstellar travel are even more remote.
The book also notes that the majority of UFO witnesses are people involved in the occult or who are close to people in the occult. Dr. Ross also notes that people being harassed by aliens have often called on Jesus for help. When the name of Jesus is used, the aliens left immediately. Calling on other religious figures such as Mohammad, Buddha, etc., has no effect. The Bible repeatedly shows that Jesus has authority over demons and evil angels.
As Ross points out, if UFOs were a real, physical phenomenon, people who spend a lot of time in the sky would see them more often than other people. Statistics indicate that is not true, however. Links to the occult is the most important determining factor. (As a professional pilot with more than 5500 hours, many of them at night, I have never seen a UFO.)
Additionally, the "aliens" offer religious information that conflicts directly with the Bible, which is the inspired word of God. They often preach Eastern style universal consciousness or deny the fact that all humans will face judgment before God. They have even provided an alternative to the Bible in the Urantia book. Ross notes that evil spirits appear as an "angel of light" (2 Cor. 11:14-15), they perform counterfeit miracles and signs (2 Thess. 2:9-10), and inspire "antichrists" to deceive and lead people away from the one true God and ultimately to eternal damnation (Matt. 24:24, 1 Tim. 4:1, Rev. 12:9). There are many UFO cults that do just this.
The inter-dimensional theory would also explain how UFOs seemingly defy the laws of physics. Often they make rapid accelerations to very high speeds and then stop suddenly. The "aliens" reportedly walk through solid objects. They disappear suddenly and leave no trace. Jesus himself could appear suddenly (Luke 24:36-37) and pass through a locked door (John 20:19).
If you are seeing UFOs and aliens, the best advice that is found in 1 John 4:1-3. Test the spirits by asking them whether Jesus is the Son of God who came to earth as a man. If they deny this, then you are dealing with an evil spirit. Seek help from Jesus Christ.
There is much evidence that UFOs are more than a myth. The question is whether they are a help or a hindrance, good or evil. Don't believe everything you hear, even if you hear it from an alien.