Express.co.uk has been reporting on the phenomena of odd-triangular UFOs which have been spotted across the United states.
The reports are often eerily similar, leading to speculation the bizarre sightings could be REAL alien craft.
Many reports tell of a silent triangle shape, defined by a series of lights, that are said to be in some cases as big as a football field, moving slowly across the sky.
Now a top UFO expert has explained how they could be experimental craft built by the US Air Force in top secret locations like Area 51 in the Nevada desert, using technology from allegedly crashed UFOs.
To read more and view the video, click here.