Those triangle-shaped UFOs just don't seem to go away. Whether they're conventional planes, experimental stealth technology or truly unexplained 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.
It used to be that most UFO spotters related stories about unusual saucer-shaped or cigar-shaped craft in the skies. Around the mid-1970s, sightings of triangle-shaped, boomerang-shaped and, yes, Dorito-shaped objects hit UFO news outlets.
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.
On April 26, three UFOs appearing to fly in a triangular-shaped formation were reportedly videotaped by a passenger on an airplane over England. The video, above, offers yet another example of how people claim to shoot odd-looking craft outside their planes.
In another case, a slow-moving triangle-shaped craft was spotted on April 28 over Independence, Mo., according to Examiner.com. An eyewitness reported the sighting to the Mutual UFO Network.
"It was very odd -- a triangular-shaped flying object that had two blinking lights in the rear only," the witness wrote. "There were no other lights on the craft like you would see on a plane."
The Missouri report has no corroborating pictures or videos, and the eyewitness preferred to remain anonymous, but she and a friend were very intrigued by the craft. "We were amazed at how this big solid object was even airborne and how it was moving so slowly!" she wrote in her report to the Mutual UFO Network.
With only a background sound of crickets, the video above, shot on April 29 somewhere in Tennessee, shows three lights in the night sky forming a triangular shape, according to Gather.com.
A careful look at the short video will reveal a fourth amber light occasionally flashing in between the three white lights.
And on Wednesday, a triangle-shaped UFO was captured on video in the middle of the day over Sydney, Australia, according to Gather.com. A video, above, lasting more than four minutes showcases an object not easily identified.
Last year the land down under also made headlines when Australia's official records of UFO sightings suddenly went missing.
With these triangular-craft reports surfacing just in these recent months, perhaps the balance of this year will yield more.