The triangle-shaped UFOs just don't seem to go away. Whether they're experimental stealth technology or truly unexplained unidentified flying vehicles, reports continue to surface about these aircraft.
And the sightings aren't isolated to a single location. Reports and videos have emerged recently from the United States, the United Kingdom and Australia.
Some of these UFOs may, in fact, be top-secret military aircraft like the ones now known to have been developed and tested at the legendary Area 51 base north of Las Vegas.
But does that explanation fit all of them? Here's a look at some of the latest triangular craft.
UFO Sighting over London - Filmed from Airplane - April 26, 2012
Three fast flying UFOs have been filmed by passenger from an airplane, just 10 minutes before passing the London Sky (England, United Kingdom) from northwest on his way to Frankfurt, Germany on April 26, 2012. UFO Sighting near London, UK.
Depending on time and speed, the location must have been somewhere between Birmingham and London
UFO Sighting filmed Over Tennessee On April 29, 2012
Three days later in another case, with only a background sound of crickets, the video below, shot on April 29 somewhere in Tennessee, shows three lights in the night sky forming a triangular shape
A careful look at the short video will reveal a fourth amber light occasionally flashing in between the three white lights.
UFO Sighting filmed Over Sydney, Australia On May 2, 2012
And on Wednesday, a triangle-shaped UFO was captured on video in the middle of the day over Sydney, Australia.A video, below, lasting more than four minutes showcases an object not easily identified.