Shake up beliefs really? I have no problem believing there are a number of animal species yet to be discovered. New ones are still being found. However... each time it can be proven with a specimen alive or dead. In this day & age photo & video can be altered, footprints can be faked, even "hair" ,"feces", "blood" etc.. can be faked from mixing different animal samples. I doubt a large primate exists in North America today, but show me a living or dead specimen and I'd be thrilled.
There are no more good TV Shows, only ones that haven't disappointed me yet.