While they may look like something from a science-fiction film, the clouds are actually a rare natural phenomenon known as lenticular clouds.

A strange UFO sighting in Susa Valley, Italy, leads to the construction of Sacra di San Michele, and according to theorists, ...

Malcolm Robinson, who has written a string of books on the subject, will be tailed by TV cameras at his Bonnybridge 'sky ...

In 1977, Brazil witnessed mysterious UFO encounters known as 'Chupa-Chupa', involving unexplained injuries and a military ...

Stacker compiled a ranking of cities with the most UFO sightings in Rhode Island using data from the National UFO Reporting Center.