The Mysterious Lycurgus Cup

Glowing Chalice

Here’s another entry in our “lost technology” file.  The 1,600-year-old Lycurgus Cup–which bears an image of Lycurgus trapped in the vines he tried to destroy*–has a strange property: it’s green until illuminated from a certain angle, whereupon it turns red. The secret has to do with nanotechnology: the Romans who crafted the cup ground down silver [Read More...]


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