when you put those two things together, you have a risk of maybe exceeding or going beyond the evidence. >> as the vatican refused further scientific analysis, we may never know if the bones really belong to peter. >> you can understand why the vatican would be so reluctant of the bones dated because they could come back with the wrong answer. >> what's more, there's no definitive evidence that peter actually stepped foot in the eternal city. >> given the roman catholics think that the pope has a very special role in delivering god's message on earth, precisely because he's the descendant of peter, it's important that peter made it there. if he didn't, then the foundations of the catholic church start to crumble. y"? it means it's much more expensive.