Is it?
We know lots of techniques that could be used to build it, we just don't know which specific technique they used. As there's little that survives. I don't find that amazing, it's also why I don't like it when they say things like its a scientific fact we don't know how they built. Well know, what's it got to do with scientific fact and we know how they could build it.
i think it's amazing that we don't know everything, life would be boring...
knowing how WE would build it isn't always the same as how they would have built it all them years ago... just saying




