Pumapunku is only explained by two options:
1) The hand of God**
2) Alien Technology**
** (might be one in the same)
There is no way that an illiterate tribe of Indians who had no knowledge of the wheel, screw or lever to have possibly created the blocks at Pumapunku 14,000 years ago...
To cut stones with such laser precision...to cut complex contained reliefs perfectly square and perpendicular to the face of the block is IMPOSSIBLE for these people....and then to move those blocks tens of miles and manipulate them defies logic....unless your willing to think outside of the box...
Wake up
i like where he talks about cuts made in perfectly straight lines and all at the same depth...as if making a jig requires the same level of genius as Einstein.
you can't even begin to know what people knew or didn't know at that time. if they weren't writing in stone or clay, and whatever else they used wasn't preserved then we're clueless. to just say "oh it was aliens" is an insult to our species. to not find evidence of writing after 14,000 years is to be expected. anything light enough to carry might be plundered within a few hundred of those years. diamond tipped tools would be the first to go. anything made of wood would simply rot into soil. assuming they'd write anything on the stones in the first place, if it wasn't chiseled in deep, it would have eroded away by now.
i don't doubt our ability to make anything, even if we've forgotten how to do it, and i don't doubt that if some king decided he something that would last forever, then that thing would be made, whether it was useful or not.
point being, i have far more belief in the ingenuity, determination and egomania of humans than i do in space ships.