The Romans Called it ‘Alexandrian Glass.’ Where Was It Really From? - The New York Times
https://www.nytimes.com/2020/07/31/science/alexandrian-glass-rome.htmlWood can easily be turned transparent to make energy-saving windows | New Scientist
https://www.newscientist.com/article/2265874-wood-can-easily-be-turned-transparent-to-make-energy-saving-windows/