The World's Strangest UFO Stories

In 1947, an alien spaceship crashed onto a ranch outside Roswell, New Mexico. According to the government, it was a flying balloon... or was it?

Experts try to separate fact from fiction while examining reports of sexual assaults by aliens on unsuspecting sleepers at night.

Examining conspiracy theories about alien infiltration of the government, royalty, big business and the media.

Scotland has a long track record of association with the mysterious and the paranormal. For its size, there are more UFO sightings there than in any other country.

One group of people says that most of the giant monuments were built or designed in the distant past by aliens who visited our planet with their super-advanced technology.

An investigation of stories about a bloodsucking alien entity in the jungles of Latin America, and theories that it may be a mutated CIA experiment or an alien traveling by portals between dimensions.

An investigation of stories about a bloodsucking alien entity in the jungles of Latin America, and theories that it may be a mutated CIA experiment or an alien traveling by portals between dimensions.

Conspiracy theorists offer the possibility of aliens running world governments. Also: covert operations in the alleged cover-up of UFO activity.

Tales of alleged extraterrestrial visitations are shared.