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?
It's been 60 years since the term "Flying Saucer" was first used to describe a UFO. In 1947, Kenneth Arnold saw something whilst flying his plane over Mount Rainier in Washington. He reported this sighting to the press but passed almost unnoticed. Two weeks later the world famous UFO story unfolded in Roswell, New Mexico.