Are all triangle ufo's man made or are they something else ? the current military designs are mostly this shape. even NASA has aircraft that look like triangles, but is it just back engineered technology ?
many people insist that all triangle UFO's are some type of secret military craft but the problem with that thinking is ,they have been reported in the early 1900's when we did not have anything like it.
http://www.theparanormalreport.com/M...NGLE-UFOS.htmlA RECENT PHENOMENON?
One reason that black triangles are considered to be manmade military aircraft is the mistaken impression that all sightings of these craft have been within the last twenty years. However, research on past UFO reports has uncovered a significant number of triangle-shaped UFOs dating as far back as the 1930's and possibly even before.
1948 triangle UFO sighting from Project Sign.
links to triangle ufo sightings
this first video here is from the Sonora Sightings website and is being shown on the UFO Hunters show on the History channel
YouTube - Giant Triangle UFO in the sky--REAL