Four years on from the appearance of several mysterious monoliths, another has suddenly shown up on a Welsh hill.
It seems that the US government's UFO office has been involved in investigating more than just UFOs.
The report seeks to quash claims that the US government is in possession of reverse-engineered alien technology.
It has now been an entire decade since Malaysian Airlines flight MH370 vanished under mysterious circumstances.
Scientists have achieved a significant breakthrough that could help to bring mammoths back to life.
The enormous footprint was found imprinted in the mud along a picturesque coastal path.
Divers are searching the lakebed for an anomalous object that has shown up on sonar images.
The banging sounds were picked up during the search for the Titan submersible which went missing last year.
It might be hard to imagine, but many millions of years ago, our ancestors had long tails just like monkeys do today.
As it turns out, this peculiar aerial phenomenon actually has a conventional explanation.
The footage, which sparked some intense debate online over its authenticity, appears to be the real deal.
Thanks to recently implemented legislation, the National Archives now features a page dedicated to UFO files.
A 5-mile stretch of rugged woodland near Leominster has been home to mysterious sightings dating back 200 years.
Scientists have proposed a possible new explanation for the origins and nature of dark matter.
Astronomers have been exploring whether these huge stellar explosions could be acting as deep space beacons.
The wildlife that still frequents the Chernobyl exclusion zone seems to have undergone some unusual biological changes.
The Moon could become a battleground among rival nations hoping to take advantage of its resources.
A radio station in Jasper was silenced earlier this month when its radio tower mysteriously disappeared overnight.
The details of the vehicle's latest mission are top secret, but that hasn't stopped an amateur astronomer from locating it.
Scientists have started analyzing the material samples returned to Earth by the OSIRIS-REx asteroid mission.