Related by context. Frequent words. (Click for all words.) 66 UFOs 62 UFO 60 UFO sightings 58 UFO sighting 53 flying saucers 52 extraterrestrials 50 paranormal 49 conspiracy theorists 48 ghost hunters 48 astrophysicists 48 extraterrestrial 48 physicists 47 ornithologists 47 cosmologists 47 sightings 46 astronomers 46 paranormal activity 46 scientists 46 pseudoscience 45 amateur astronomers 45 crackpots 45 birdwatchers 45 climatologists 44 psychics 44 historians 44 hauntings 43 botanists 43 Scientologists 43 conspiracy theorist 43 oceanographers 42 scientific 42 alien abduction 42 ecologists 42 skeptics 42 astronomy 41 flying saucer 41 biblical scholars 41 stargazers 41 astronomer 41 global warming skeptics 41 Bigfoot 41 evolutionists 41 anthropologists 41 theorists 41 wikipedia.org 41 humanists 41 aliens 40 phenomena 40 palaeontologists 40 Snopes.com 40 evolutionary biologists 40 Paranormal 40 birders 40 Earthlings 40 Loch Ness Monster 40 mystics 40 science fiction 40 Darwinists 40 alarmists 40 hoaxes 40 geophysicists 40 mathematicians 40 naturalists 40 fundamentalist Christians 39 skeptic 39 scholars 39 observatories 39 earthlings 39 theologians 39 paleontologists 39 entomologists 39 bird watchers 39 extrasolar planets 38 seismologists 38 theoreticians 38 geeks 38 apparitions 38 peer reviewed literature 38 climatology 38 crackpot 38 treasure hunters 38 cosmic ray 38 cults 38 zoologists 38 Fourth Kind 38 archeologists 38 futurists 38 charlatans 38 neuroscientists 37 conspiracy theories 37 boffin 37 cosmology 37 sighting 37 creationists 37 occult 37 hoaxer 37 geologists 37 Astronomer 37 boffins 37 biologists 37 astrophysicist