Fact or fiction? Stained glass found in medieval cathedrals becomes thicker at the bottom because glass moves over time. For years researchers have had their doubts, now scientists have further evidence that glass is not going anywhere.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/k...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/k...