Scientists who once rolled their eyes at flying saucer stories are now treating strange things in the sky as a serious ...

From sightings by U.S. submarines to mysterious humanoids in the depths of Russian lakes, there is an even more mysterious cousin to the UFO - the USO, or Unidentified Submerged Object. There are ...

NASA has sensationally revealed it will officially start hunting for aliens as the US space agency shares the results of a mysterious eight-month-long study into unidentified flying objects. While ...

NASA cannot rule out that 'potential unknown alien technology' is operating in the Earth's atmosphere, a new report has concluded. The study of flying saucers, UFOs and claims alien spaceships are ...

An unidentified object near the California coastline, seen here in a computer-generated image, has reignited public debate over “unidentified submersible objects,” reportedly moving beneath US waters.

A mysterious US Navy sonar recording revealed an "unusual trench" on the seafloor, as scientists are now looking into the possibility of 'underwater aliens'. Timothy Gallaudet, the former head of the ...

Nasa has released the first findings from its report into unidentified anomalous phenomena, or UFOs. The US space agency commissioned the study in response to a variety of reports of what appear to be ...

A mysterious "alien-like" creature with four limbs and a "reptile" skull has washed up on a beach in Australia. Queensland man Alex Tan was stunned to come across the remains while walking on ...

An expert has warned that people may be looking in the wrong place for UFOs after NASA's report into Unidentified Anomalous Phenomena (UAPs) failed to find definitive evidence sightings were ...

The man who has staked his reputation—and billions of pounds—on turning humanity into an interplanetary species has a ...