CSICOP
World-wide organization that encourages the critical investigation of paranormal and fringe-science claims from a responsible, scientific point of view.
http://www.csicop.org/
Cirkelmakers
Cirkelmakers
http://www.circlemakers.org/
Internet UFO Skeptics
Internet UFO Skeptics
http://www.debunker.com/ufo.html
Skeptical Believer
The skeptical believer: essays by john shirley.
http://www.darkecho.com/skepticalbeliever/index.html
UFO skeptics
An information site on the ufo phenomenon by and for professional scientists
http://www.ufoskeptic.org/
UFO Folklore
Ufo folklore! ufos ufo news ufo sightings ufos ufo picture ufo videos ufo reports flying saucers ufos aliens alien abductions ufo sightings ufo folklore ufo news ufo sightings ufo reports xfiles roswell area 51 ufo sightings
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http://www.qtm.net/~geibdan/framemst.html
UFO Watchdog
UFO Watchdog
http://www.ufowatchdog.com/