The second, well, we descend from a common ancestor with reptiles. Even if these traits are throwbacks to our evolutionary history, have we really ruled out the possibility that they are actually basal Reptiliomorpha traits? If they are, there might be a slim chance enough of the DNA has stuck around for an occasional atavistic trait to appear.
This is not obscure science that a sincere research might reasonably have missed. In principle, if the alien hypothesis of these traits origins is true, these issues might be overcome. But they have to be acknowledged, and the explanation of why these issues are not in play must be presented if you really want your argument to be taken seriously.
Of course, this isn’t their real argument, their real argument is that entertainment and annoying 15th rate bloggers will make History Channel money.
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