Full-text scans of the sci-fi magazine Galaxy, courtesy the wonderful Internet Archive. The US government’s official page on how to prepare for a nuclear attack. A 17th-century “traveling library”. Behold tenyearsago.io, which shows you how various major sites — Amazon, CNN, the New York Times — looked, ten years ago from today. A human-to-elephant translation device. A machine that lays out dominos with precise spacing, for quick toppling. A history of the Sidekick, the best-designed mobile phone I ever owned. Using visual-recognition to play “Rock, Paper, Scissors” in your webcam.