The long-running enigma of the mystery monoliths has entered a new chapter this week.
The private jet and its passengers had vanished without a trace, leading to decades of fruitless searches.
Conservationists have been left puzzled by the discovery of an invasive species of squirrel on a Scottish island.
A huge search and rescue effort is currently underway to locate Michael Mosley who disappeared four days ago.
Questions have been raised over the vanishing of the bodies of two prominent British explorers from the mountain.
China's answer to the X-37B is doing something in Earth's orbit and nobody is quite sure what that might be.
The peculiar object had been found along a remote forest track recently in Haywood County, North Carolina.
Efforts to determine what was inscribed upon the stone, which was found in a man's patio, had proven challenging.
The curious inscription was discovered quite by accident underneath a stone slab in a homeowner's garden patio.
More than 20 people who excavated King Tutankhamun's tomb in the 1920s later died young from a range of maladies.
Several witnesses claim to have had an encounter with what has been described as a growling bipedal creature.
The peculiar incident saw rider Karl Siao Dagus seemingly ride straight through a mystery figure in the road.
Four years on from the appearance of several mysterious monoliths, another has suddenly shown up on a Welsh hill.
Researchers have solved the mystery of whether or not Spinosaurus was adept at pursuing its prey underwater.
The banging sounds were picked up during the search for the Titan submersible which went missing last year.
A fishing crew has reportedly recovered what is thought to be the remains of another spy balloon in the waters off Alaska.
Several people claim to have witnessed and even photographed one of the strangest recent cryptozoological enigmas.
NORAD has been tracking an unknown high-altitude balloon that was first spotted on Friday.
The grisly and unnerving discovery left local authorities scratching their heads.
Scientists have proposed a possible new explanation for the origins and nature of dark matter.