How to calculate the odds that an alien spaceship has been spotted

One in a million or 1 in 10? Mathematics can help us work out the odds of whether recent sightings of UFOs are really alien spaceships.

Do aliens exist? We asked 5 experts

Even if aliens exist, are intelligent like humans and interested in making contact with us, what are the chances they'll be close enough for us to hear them screaming their presence into the cosmos?

No ET, no answers: Intel report is inconclusive about UFOs

A long-awaited U.S. government report on UFOs makes at least one thing clear: The truth is still out there

Former Navy pilot describes encounter with UFO studied by secret Pentagon program

UFO lovers, ghost hunters, psychics at Fort Knox State Historic Site

‘Experiencers’ share abduction stories

UFO in Augusta turns out to be restaurant light