NASA has announced its mystery reveal - the record-breaking detection of a star 12.9 billion light years away.
The space agency is expected to announce an intriguing new discovery made using the Hubble Space Telescope.
The findings bolster one particular explanation to one of the 20th-Century's most enduring mysteries.
It has been 25 years since a mass UFO sightings over Phoenix, Arizona captivated the world.
A jogger recently came across this indescribable creature and nobody seems to know what on Earth it is.
A road in the UK has become so warped that parts of it are now sitting at a 45-degree angle.
A tiny island off the north-west coast of Scotland was once the site of a deadly germ warfare experiment.
A witness who had been driving home in the early hours of Sunday morning encountered something very unusual.
The US tactical fighter jets were sent to intercept a suspicious object near Kauai's north shore.
The man had been walking outside when he was hit by a bullet that seemed to come out of nowhere.
A railway crossing in England has gained something of a haunted reputation over the years.
The mysterious object, which mirrored the pilot's movements, was captured on camera.
Prof Don Arnold and colleagues have been attempting to solve the long-running mystery of where our memories are stored.
China's Yutu-2 rover has determined the nature of a mystery cube-shaped object that was photographed last month.
Beneath Mount Wingen in New South Wales lies a fiery inferno that predates modern civilization.
The fascinating discovery could turn what we know about galaxy formation on its head.
A pilot flying over the Pacific has captured footage of several sets of lights moving in formation through the clouds.
A short video clip of what has been described as a mystery ape-like creature has recently appeared on Instagram.
China's Yutu-2 rover has set its sights on a very strange object spotted far off in the distance.
Strange tracks left by giant sauropod dinosaurs have been leaving experts scratching their heads.