There is no mystery, Barry Manilow sang it!
the mystery is why do people buy into something with no quantifiable validity, which was dreamed up by 2 journalists in the 1950s to fill an extra space in a sunday newspaper?
It's actually a trapezoid with a really, really, really short 4th side.
It's a mystery stupid. If I told you then it wouldn't be a mystery now would it? What's wrong with these people?
Obviously the cannibals of Atlantis!