LOL! Tsoukalos is a riot. So are Childress and Däniken. Good entertainment. :)
If you notice, Tsoukalos always makes his comments in the ‘What if aliens did so and so” form.
But the other day I saw him actually say that the one thing that makes him positive it was done by Ancient Aliens was the Puna Punku site in Bolivia. It was a whole one hour program on that site.