This is slightly OT, but bear with me...
So I got into a slight philosophical bad mood on Saturday, as I passed some nutter trying to sell the idea that the Earth was flat, gravity doesn't exist etc. (with flyers, posters and other advertising near the middle of Edinburgh University....)
...then I saw the 'documentary'
Ancient Aliens yesterday.
I became internally apoplectic.
A series of guys trying to sell their latest book, led by the Granddaddy of ancient aliens 'research', Erich von Daniken.
Talking nonsense, pretending to be scientists but wilfully ignoring evidence, or more often than not, just making it up.
(as an anecdote to them I heartily recommend this:
It's very long, but really it's broken up into small segments looking at individual cases)
Of the Ancient Aliens program, I could only handle ten minutes of people telling me it was amazing that different cultures in different times had built pyramids. Clearly it was because an alien had told all of them the basic design plans. OR perhaps it was because we humans, when trying to build something huge and monumental had worked out that the pyramid made perfect sense.