His job was to uncover secrets from the unknown. But his curiosity opened doors that the government preferred to keep closed.

Get the latest news about Project Blue Book. Find exclusive interviews, video clips, photos and more on Entertainment Tonight.

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.

UFOs, or the notion of them, have been around a long time. Here’s a look at how the various iterations of the subject — from ...

With Tucson out of the picture for the Project Blue data-center complex, Marana has emerged as a possible prospect for a replacement location. Not only is the town of 62,000 people Pima County’s ...

The Advanced Aerospace Weapons Systems Application Program was the largest government-funded UFO investigation in history, ...

There are a ton of books in this sale, so making recommendations is both very easy and very difficult at the same time. I'll reiterate once again that it's absolutely worth just going into the sale ...