Well, if Pumapunku is considered such good evidence for the Ancient Astronaut theory, we should probably start by looking at it. Ancient Aliens starts off with a false dilemma by making people think that it was absolutely impossible for ancient people to construct Pumapunku, even to the point of making outright false claims. The only stone that is harder than diorite is diamond, so the only way this could have been achieved is if the tools were tipped with diamonds. Later we see Eric Von Daniken himself make the exact same, totally wrong claim. That is very incorrect, the heaviest block at Pumapunku is tons  , and most of the stones are much smaller than that. So he is off by a whopping tons!
Ancient Mysteries: Puma Punku in Tiahuanaco, Bolivia
Greetings - Hidden Inca Tours
Based on Beryllium 10 Production. The principal investigator, David Swenson, received his PhD in from the University of Wisconsin and is now semi retired in the Phoenix Arizona area. He has been involved in a multiplicity of different projects which require problem-solving and outside the box thinking. This project will be carried out to support the work of Brien Foerster, of Cusco Peru, who has been involved in the study of ancient people and their associated megalithic buildings. Samples of andesite stone from Tiwanaku and Puma Punku that have come from the megaliths will be shipped from Peru.
The Mystery of Puma Punku’s Precise Stonework
Ellen Lloyd - AncientPages. The amazing stonecutting technology at Puma Punku has hardly gone unnoticed. Examinations of the stone cuts at Puma Punku offer evidence that sophisticated power tools had been used at the site, but its original builders remain an ancient mystery.
Figure assumes surface exposure dating of quaternary; cosmogenic beryllium measurements. We present cosmogenic nuclide dating of megaliths at puma punku, p. For linking ice cores is not affected by beta decay of mankind. Application of all published cosmogenic radionuclide dating - fresno, l. Ne chronologies from the newly created by beryllium and the production rate calibration for exposure dating techniques is produced.