Towering over the World War I battlefield at Verdun, a giant statue of Charlemagne—the Frankish king crowned the first Holy Roman Emperor on Christmas Day, 800 AD—rests its arms on a mighty broadsword ...
If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...
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