Codebreakers have been able to read a cache of more than 50 encrypted letters written by Mary Queen of Scots more than 400 years ago. (Jennifer Ouellette / Ars Technica)
Codebreakers have been able to read a cache of more than 50 encrypted letters written by Mary Queen of Scots more than 400 years ago. (Jennifer Ouellette / Ars Technica)