an Entity references as follows:
This is a list of topics studied in the field of ufology. * Alien abduction * Ancient astronauts * Aura * Close encounter * Crop circle * Extraterrestrial hypothesis (ETH) * Identified flying object (IFO) * Interdimensional hypothesis * Circular wing * Missing time * Psychosocial hypothesis * Unidentified flying object (UFO) * Xenoarchaeology * Zoo hypothesis