A panel of former government officials spoke about the subject at the Atomic Testing Museum this month.
Residents of a remote island community have been plagued by mysterious screams and howling noises.
Newly declassified documents suggest that authorities knew all about the Broad Haven Triangle mystery.
Dashcam footage has revealed the moment a fireball lit up the sky over Thailand on Monday morning.
A perplexing series of unexplained phenomena hit the English town of Warminster back in the 1960s.
Efforts to uncover the secrets of the tomb linked to Alexander the Great in Greece have come to a halt.
Researchers have identified a subtle optical illusion responsible for the painting's enigmatic smile.
An English archaeologist believes that Queen Nefertiti may lie in a secret room in Tutankhamun's tomb.
A sword found in Lincolsnhire's River Witham in 1825 bears a peculiar inscription that nobody can read.
Researchers have finally identified what has been causing loud booming sounds across the state.
Scientists have found a genetic link between the indigenous peoples of Australia and South America.
Col Charles Halt has revealed that radar operators had tracked a bogie at the time of the incident.
Researchers have been investigating a 350-year-old UFO case that remains a mystery to this day.
More than 600 dogs have inexplicably jumped off the 50ft Overtoun Bridge in a rural part of Scotland.
A 508 million-year-old spiky sea creature was so strange that scientists decided to name it Hallucigenia.
An unexplained pair of hands has appeared in photographs taken by two separate cameras in Borneo.
Scientists have found what is causing billions of gallons of water to drain out within a matter of hours.
New research has revealed that the stone's inscription does not relate to the person buried beneath it.
Scientists have finally worked out the answer to a mystery that has endured for over a century.
Over half of the world's remaining saiga antelope population has dropped dead within the last few weeks.