The one about evolving? I think it would be controversial because it's showing warthogs and then a guy and it seems to be suggesting that we evolved from warthogs. In fact we did not evloved from them, or even from apes. We evolved with apes but not from them. I think that it may also offend those who do not believe in evolution (even though you can't deny it's existance due to the fact that everytime bacteria reproduce they are evolving and changing; in fact evolution is simply a change that happens gradually over time) I think this may be the reason.

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