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Black triangles are a class of unidentified flying objects, or UFOs, with certain common features which have reportedly been observed during the 20th and 21st centuries. Media reports of black triangles originally came from the United States and United Kingdom. The aircraft may be related to the rumored USAF Aurora aircraft developmental program.
Reports generally describe this class of UFOs as large, silent, black triangular objects hovering or slowly cruising at low altitudes over cities and highways. Sightings usually take place at night. These objects are often described as having pulsing colored lights that appear at each corner of the triangle.View More Black triangle (UFO)