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RE: Maybe Machu Picchu was Already 3D Printed Before the Incas Got There
https://chiefio.wordpress.com/2011/12/22/liquid-stone/#comments
You might already have read that but if not it's a treasure trove and more musing in the comments, where there's this as well:
http://sentinelkennels.com/Research_Article_V41.html
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I haven't seen that before, and yes, that will keep me busy for a while! thx
My pleasure!
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