A trove of documents, photographs and records pertaining to the FBI's search for a lost gold horde has been published.
The European Space Agency is working on a new mission to track down dark matter and find out what it is made of.
The end of the spacecraft's current mission was marked by a series of sonic booms over Florida on Saturday.
The vehicle, which remains shrouded in mystery, has been described as a 'reusable experimental spacecraft'.
The US government's secretive UFO program did more than investigate sightings of unidentified arial phenomena.
Caroline Humphries has lived in one of England's most haunted houses for the better part of five decades.
The secrets of a 3,500-year-old mummy have been revealed for the first time thanks to modern imaging technology.
Scientists have discovered a previously unknown opening situated 62 miles beneath the planet's surface.
The latest mission of the mysterious space plane has so far lasted 500 days and nobody knows what it's up to.
Traces of the ancient South American city can still be found in the roads and structures of modern Mexico.
Scientists are close to proving that a cube of uranium was part of Germany's secret WWII nuclear program.
Some of the world's highest and coldest places contain important, hidden clues about our planet's history.
The space probe, which landed in 2018, has revealed some surprising findings about the planet's interior.
From Bigfoot on the Moon to the face of Jesus in a piece of toast - why do we see faces where none exist ?
Newly disclosed documents have revealed what the FBI was digging for in Pennsylvania three years ago.
A ranch made famous for its black mailbox and proximity to the secretive US base is now available for purchase.
Scientists have made new discoveries about a mysterious element that is named after Albert Einstein.
The SpaceX CEO has made no secret of his ambition to see humans living on the Red Planet in his lifetime.
New details have emerged of a peculiar Cold War-era phenomenon associated with Soviet missile launches.
The UK Ministry of Defense has blocked the scheduled release of a dossier detailing a famous UFO case.