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In April 1542 a letter left Rome for the court of Charles V in Spain. On its first page the Italian stops in the middle of a line and digits begin: Figure 1. The opening of the cipher, f. 70r. Archivio Apostolico Vaticano (AAV), Segr. Stato, Spagna 1A, photograph supplied through DECODE record 92. Detail enlarged from the photograph.
42 min · 9,580 words
How Hacker News ranking really works: scoring, controversy, and penalties
Ken Shirriff reverse-engineers Hacker News ranking: the gravity formula, controversy penalties after ~40 comments, title/domain penalties (including historical NSA demotion), and how ~20% of front-page stories are tweaked.
15 min · 3,547 words