Archaeologists have unearthed one of the most important discoveries of recent years - a huge tunnel beneath a temple in Egypt.
The image, which appears to date back to the 1960s, seems to show a ghostly extra hovering in the background.
An Earth-based extremophile has shown that it is possible for life to survive on Mars for very long periods of time.
The tomb of St Nicholas - the real-life inspiration behind Santa Claus - lived and died around 1,700 years ago.
Palaeontologists have unearthed what is thought to be the leg bones of the largest species of bird to ever live.
Harvard astronomer Avi Loeb and colleague Amir Siraj believe that they have identified another interstellar visitor.
The controversial plan would involve using a fleet of 125 tanker jets to shroud part of the Earth's atmosphere.
The 17th-Century burial was recently unearthed by archaeologists at a cemetery in Poland.
The Harvard astronomer believes that a meteoroid that fell to Earth in 2014 could contain alien technology.
A man dubbed 'loneliest on Earth' has died after spending decades alone in the Brazilian rainforest.
The length of one Earth day has been increasing and nobody seems to know why this should be the case.
Archaeologists have unearthed thousands of Bronze Age artifacts pertaining to a mystical alternative realm.
Astronomers have discovered the fastest-growing black hole ever seen and it's an absolute whopper.
An enormous tree in the Chilean Andes is a contender for the oldest living tree on Earth at 5,400 years old.
A grave marker inscribed with a curse in red lettering was found during conservation work at Beit She'arim park.
Known as 'trioxides', these highly reactive chemicals could be contributing to health and environmental problems.
Archaeologists have unearthed the skeleton of a woman who was buried on a bed adorned with images of mermaids.
A new type of flying reptile from the age of the dinosaurs has been unearthed in the Andes mountains.
The groundbreaking congressional hearing offered some interesting revelations - but was alien contact one of them?
Scientists have found signs of a historical earthquake so large that it produced a tsunami 5,000 miles long.