The National Geogrpahic thing was exposed within weeks! By scientists! That story is a plus for evolutionary biology - it shows it's honest. And the so-called "dawn horse" is called
Hyracotherium, not Hyrax. Its not a hyrax anyway. Owen gave it that name in 1841 because he thought it might be related to hyraxes. Later research revealed it to be a primitive member of the horse group. Owen's name stands because he christened it first. Them's the rules of scientific nomenclature.
I think you might be better served reading something other than creationist propaganda if you want to question the validity of evolution.