In June 1947, Kenneth Arnold saw something strange in the sky. What he saw sparked a national UFO craze-but it was far from ...

Newly-released material from the so-called UFO files includes reports of unexplained green orbs, discs and fireballs zooming across the sky, with investigators yet to find an explanation for the sight ...

In 1947, the United States Air Force claimed that a "flying disk" had been recovered in New Mexico, but quickly retracted the findings David Zaitz/Getty Images Roswell UFO Museum Sign Ufologists call ...

As the film Disclosure Day rolls out in cinemas, director Steven Spielberg is once again pushing audiences to imagine what ...

If you wanted to put a precise date on the origins of our obsession with saucers, the most-cited contender is June 24, 1947. That was the day that Kenneth Arnold, an amateur pilot from Idaho, was ...

If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth. Eerie UFO sightings we can’t 100% explain Everyone has an opinion when it comes to ...

Add Yahoo as a preferred source to see more of our stories on Google. UFO fans are convinced that a book published in 1716 offers proof that aliens have been visiting our planet for centuries - in the ...

A second batch of previously classified files on reported UFO sightings has been released by the US Department of Defence. Catch up below.