Nova Ghosts of Machu Picchu PBS Documentary
Documentary Film is a broad category of visual expression that is based on the attempt, in one fashion or another, to document reality.
Knowledge comes in different ways through our five senses. Hearing, watching, touching, smelling and tasting are the only doorways to the outer world.
The wise men say that if something is not truly experienced with all our five senses, the experience will be partial, not total. Therefore in a way almost all our gained knowledge through life is partial.
And maybe they are right.