Are UFO's, ghosts, and Bigfoot real?

What does the Bible say and not say about UFOs, ghosts, Bigfoot, and other phenomena? Proverbs 25:2 says that it is the glory of God to conceal a thing - but its an honor to search out the matter. Too much credible proof and impeccable witness testimony, throughout hundreds of years - exist, and only an arrogant and narrow minded individual would dismiss it out of hand. We don't know everything, and even John the revelator was told by an angel not to write down certain things he witnessed in the future. Let us be cheerfully curious about God's huge creation!