Related by context. Frequent words. (Click for all words.) 81 UFOs 73 UFO sightings 67 flying saucers 62 flying saucer 54 paranormal 53 extraterrestrials 52 extraterrestrial 50 meteor 49 Paranormal 49 paranormal activity 48 Bigfoot 47 Loch Ness Monster 47 sightings 45 aliens 45 Planetary 43 Asteroid 42 Bermuda Triangle 42 outer space 42 aurora 42 meteorite 42 asteroid 41 alien 41 X Files 41 spaceship 41 orb 40 hauntings 40 meteor shower 40 science fiction 40 comet 40 Nessie 39 Nasa 39 sonic boom 39 conspiracy theorist 39 Close Encounters 39 ghost hunters 39 UAV 39 Sci fi 39 funnel cloud 38 amateur astronomer 38 astronomy 38 Saturn moon 38 Loch Ness monster 38 Roswell NM 38 alien invasion 38 conspiracy theorists 38 airships 38 sighting 38 Astronomy 37 JFK assassination 37 Star Wars 37 lunar landing 37 wormhole 37 astrophysicists 37 Space 37 sci fi 37 NASA 37 dragonfly 37 airshow 37 Science Fiction 37 Galactic 37 spaceships 37 apparitions 37 Martian 36 NORAD 36 amateur astronomers 36 SETI 36 meteors 36 moon 36 astrophysicist 36 apparition 36 Ghost Hunters 36 Stonehenge 36 celestial bodies 36 funnel clouds 36 Star Trek 36 Collider 36 meteorites 36 USAF 35 airship 35 astronomers 35 Aerospace 35 Atheist 35 flyby 35 Mars 35 Telescope 35 galactic 35 spacecraft 35 asteroids 35 Global Warming 35 Sightings 35 astronomer 35 Climategate 35 Cassini 34 Cassini spacecraft 34 orbs 34 Flight 34 Carl Sagan 34 Alien 34 Sasquatch 34 Stargate 34 Mars Rover