Sunday October 4, 2009, 7:41 pm
Amazing, but their estimate of the construction time falls into the same category as the construction of the Great Pyramid of Egypt. They would have had to work 7 days a week, 24 hours a day to complete it in only 60 years with the technology they are attributing to the Incas. The logistics for providing housing, food and water for that size workforce at that altitude is also unrealistic and it is those factors that make this achievement so remarkable.

Monday October 5, 2009, 4:26 am
amazing