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Freethought & Rationalism ArchiveThe archives are read only. |
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#21 | |
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Veteran Member
Join Date: Mar 2001
Location: Ireland
Posts: 3,647
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Quote:
Duck! |
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#22 | |
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Contributor
Join Date: Jan 2001
Location: Barrayar
Posts: 11,866
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Quote:
Red Jean-louis Protzen's work on the Inca fortress-quarry complex at Ollantaytambo. It is aimed at explaining this very question. The methods are almost entirely known. |
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