Correct, however they dont have the right to warp facts. They are misinforming people with this information. They do not interpret the mainstream ideas correctly, they don't have their facts and dates right, nobody on the show is an actual scientist even though it says they are, and when looking up their credentials they have none. If the history channel wants to display history, then they are responsible to display ideas with accurate information. If they stated that this only theory and compared to mainstream ideas then i would have mo problem. I think its ignorant to say we are
alone in the universe considering what we know about it but they aren't even on the right track. You are right, liberty does give you the right to be stupid. However Liberty doesn't mean the right to display false stupid, or speculative or pseudo ideas, especially when they've been proven wrong. A simple peer review of the subject will prove that the show is ridiculous.