| http://www.w3.org/ns/prov#value | - A new (not so new anymore) study debunks the persistent belief that stained glass windows in medieval cathedrals are thicker at the bottom because the glass flows slowly downward like a very viscous liquid.Edgar Dutra Zanotto [1] of the Federal University of Sao Carlos in Brazil calculated the time needed for viscous flow to change the thickness of different types of glass by a noticeable amount.
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