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Maybe they just weren't ready for Chuck Berry yet. (but their great great great great great great great great great great grandkids are gonna love it)
In all seriousness, I agree with you.
I roll my eyes every time these tabloid-cable pseudo-documentary shows portray some of the images as if they are helmets and space-suits too, or that paying attention to astronomy and having calendars implies some sort non-human intervention. It's as if we are the only generation or culture that are supposed to have cerebral cortexes.