Jordan Flowers claims Russia and China may be reverse-engineering alien technology, raising national security concerns.

In fact, throughout history there have been numerous reports of supposed alien spacecraft sightings that have turned out to ...

For decades, humanity has searched the universe for signs of alien life — but some scientists warn that finding it may come with terrifying consequences. This video explores NASA’s Voyager missions, ...

A striking optical illusion resembling a floating city or alien spacecraft was captured on camera above the countryside in ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

A covert Chinese space plane has quietly released a new UFO-like object into orbit, according to US tracking data, fuelling ...

In 1988, the Soviet Union launched two of its most ambitious spacecraft ever built not toward Mars itself, but toward one of ...

Take a drive to the CIA’s Area 51 – a route with more UFO sightings and unexplained mysteries than anywhere else on Earth ...

During the 1960s, the United States prepared to fend off nuclear missile attacks from the Soviet Union—unaware that the gravest threat was not looming across the globe, but outside of Earth’s ...

In the searing Mediterranean summer, wildfires turn dangerous in minutes. Greece has learned that at a terrible cost. In 2018 ...

Emily Blunt and Josh O'Connor race around the Midwest trying to expose UFOs in a hectic adventure that lacks intelligent life.

NASA works with scientists worldwide to advance our understanding of what hazards are in our solar system and how we can mitigate the risks.