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POPSEureka! A Prayer for Archimedes Archimedes wrote his manuscript on a papyrus scroll 2,200 years ago. At an unknown later time, someone copied the text from papyrus to animal-skin parchment. Then, 700 years ago, a monk needed parchment for a new prayer book. He pulled the copy of Archimedes' book off the shelf, cut the pages in half, rotated them 90 degrees..... More on this interesting find at http://www.sciencenews.org/articles/20071006/mathtrek.asp http://www.sciencenews.org/articles/20071006/mathtrek.asp