Area 51 is a top secret USAF base officially known as Air Force Flight Test Center, Detachment 3, and is located in a remote area of land in the southwestern portion of southern Nevada.
Secrets of the Skies
What is a black hole, Why did the Hindenburg explode into a ball of fire? Have beings from outer space ever landed on Earth and tried to make contact with its inhabitants?
Roswell in New Mexico is the scene for what is probably the most famous UFO Incident, which involved the recovery of materials which have since become the subject of intense speculation, rumour, questioning and research.
The Tunguska Fireball Event was a huge blast near the Tunguska River which was estimated to be between 10 and 20 megatons of TNT, 1,000 times more powerful than the bomb dropped on Hiroshima. The source of the explosion has never been fully explained.
A history of UFO's since their first observations, and while most have a perfectly simple and valid explanation there are some that defy current understanding.
Crop circles are a generic term used to describe the flattening of crops, usually in a circular particular pattern. They range between simple circles, to complex and intricate patterns and usually appear in fields overnight.
Around 1930, in a mine about 100 miles south-west of the Mexican city of Chihuahua, buried underneath a human skeleton a mysteriously deformed, smaller skeleton was discovered. Dubbed Starchild, this skull has some very abnormal features, not seen anywhere else.
Japan's chief government spokesman has announced that Unidentified Flying Objects (UFOs) exist.
A group of former pilots and government officials has called on the US government to reopen Project Blue Book, an investigation into claims of UFO sightings, an investigation that was closed in the late 1960's.