How 'Unicorn Horns' Became the Poison Antidote of Choice for Paranoid Royals

Elizabeth I, for one, was known to drink from a unicorn horn cup, believing that if poison touched it, it would explode.

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The Strange History of Royals Testing Food for Poison With Unicorn Horn - Gastro Obscura

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The Unicorn Horn — a poison detector and antidot.: englishhimki — LiveJournal

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