e-4c News Portal - Codebreakers reveal secret messages written in 16th century queen's letter

Here's how researchers found and deciphered 50 secretly coded letters that Mary, Queen of Scots wrote while she was imprisoned in England. Discovery's Curiosity Daily podcast helps you get smarter about the world around you. Find Curiosity Daily today on Apple Podcasts, Spotify, or wherever you get podcasts. Listen now.

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