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Old 01-18-2013, 06:27 AM   #17
tessaduck
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Join Date: Oct 2010
Location: Oregon
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Whoa! I just checked Wikipedia for tesseract. It exists! It's a really cool geometry concept, and there's even a Heinlein story that predates L'Engle's. Check out the entry , with its awesome images and animations.
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Last edited by tessaduck; 02-12-2013 at 02:30 PM..
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