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Scientists have shown that an obsidian hand-mirror once owned by the Renaissance polymath John Dee has Aztec origins, thus confirming a longstanding mystery. John Dee was quite the character. Born in ...

To summon spirits, sixteenth-century English astrologer John Dee, a confidant of Queen Elizabeth I, gazed into a mirror made of polished stone. Now, researchers have confirmed that Dee’s mirror has ...

LONDON, ENGLAND—According to a CNN report, Stuart Campbell of the University of Manchester and his colleagues examined several obsidian objects held at the British Museum. One of the objects, a mirror ...