Major change is afoot regarding NASA's plans to return samples of Martian soil and rock to the Earth.
A retired rear admiral has expressed concerns over UFOs that have the ability to transition from air to water.
At the time of its original release, some people believed that the iconic found-footage movie was actually real.
The Harvard astrophysicist has become synonymous with the hunt for evidence of aliens in recent years.
It would have been one of the most revolutionary and ambitious constructions on Earth... so where is it ?
The SpaceX CEO has some ambitious plans to build a thriving city on the Red Planet within as little as 20 years.
A high-profile mass UFO sighting in Australia is still no closer to being solved almost six decades later.
If this early concept image is anything to go by, the astronauts could soon be zooming around on the Moon in style.
For years, archaeologists have remained divided over the discovery of alleged giant skeletons and artifacts.
The hunt is on for King Arthur's famous blade... even though nobody is sure that it actually exists at all.
The alleged sasquatch was sighted along the top of a nearby ridge back at the beginning of February.
Forensic experts explain what we do know about MH370's disappearance and why its whereabouts remain so elusive.
A recent paper concerning the controversial site in Indonesia has been fully retracted by publishers.
Over 45 years ago, pilot Frederick Valentich vanished without a trace after encountering a UFO off the coast of Australia.
An image shows what appears to be some sort of serpent-like creature in New York's Hudson River.
Something seems to be buzzing nuclear power plants in India and nobody knows what it could be.
Scientists have spent decades attempting to locate the long-lost medieval Yorkshire city of Ravenser Odd.
A newly identified ancestor of modern day frogs has been named after Jim Henson's iconic green Muppet.
In a new study, researchers put together a map showing the parts of the country where sightings are most common.
David Paton believes that he had an otherworldly encounter while driving home one night over 30 years ago.