Unidentified flying objects are flying objects whose nature is unknown, often thought to have extraterrestrial origins.
Regular Websites
More commonly known as MUFON, the mission of this organization is to further the scientific study of UFOs for the benefit of humanity, investigating UFO sightings and collecting the data in its database, and educating the public on the phenomenon of unidentified flying objects and their potential impact on society. - Mutual UFO Network
http://www.mufon.com/
Reports of sightings of unidentified flying objects can be made through the NUFORC online report form, to be added to a database which can be accessed by site visitors, along with case highlights and briefs chosen by the directors, historical reports, videos, and other resources. - National UFO Reporting Center
http://www.nuforc.org/
Case files, special cases and research files on unidentified flying object reports and sightings are featured here, along with various documents on the subject, photographs of UFOs, videos, and alien files. - UFO Casebook
http://www.ufocasebook.com/
Provides in-depth research and information on the UFO phenomenon. Includes current and past UFO sightings reports, topical articles, documents and resources, UFO photographs, cases directory and discussion forums. - UFO Evidence
http://www.ufoevidence.org/