Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

It's World UFO Day, but questions about aliens, UFOs and what governments know about them remain. UFO researcher Jon Stewart ...

For instance, what if we really are being visited by aliens from other worlds and they turn out to be aggressive, violent, ...

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

A polarizing Harvard University astronomer known for splashy theories about alien visits has been tapped by the White House to lead a team of outside scientists to study the national security risks ...

A US pastor claims a private UFO briefing warned of future disclosures that could challenge biblical teachings, urging ...

Astrophysicist Neil deGrasse Tyson has a blunt request for the government as the Pentagon rolls out the highly anticipated UFO files — just “show the alien!” Tyson shared his two cents Monday on “The ...

The Great Filter theory suggests advanced civilisations may self-destruct before contacting others, explaining the universe's silence.

This extremely mysterious phenomenon of UFOs or UAPs inevitably touches on matters of religion, spirituality, morality, and ...

Add Yahoo as a preferred source to see more of our stories on Google. A NASA astronaut preparing for a grueling eight-month stint in orbit has revealed a plan to test for extraterrestrial life on the ...

Astrophysicist Neil deGrasse Tyson has a blunt request for the government as the Pentagon rolls out the highly anticipated UFO files — just "show the alien!" Tyson shared his two cents Monday on "The ...