President Donald Trump criticized Barack Obama for his comments on aliens. Then, he said we should release more files. Joe Biden signed disclosure bill.

It’s one of the most popular themes in science fiction—top secret government experts are ready to spring into action if a UFO appears. For example, in the novella-based 2016 film Arrival, the ...

If Earth’s astronomical observatories were to pick up a signal from outer space, it would require an all-hands-on-deck effort to untangle and decipher the extraterrestrial message. An art project from ...

Explore hidden UFO events from Arizona's rich history, groundbreaking Las Vegas footage near Area 51, and recent alien disclosures in Mexico. This series features fresh interviews, declassified Cold ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. If Earth’s ...